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List of Publications, Niitsuma Lab.

2010

  1. H.Asanuma, Y. Kumano, H. Moriya, H. Niitsuma, M. Haring, Interpretation of reservoir creation process by super-resolution mapping of microseismic multiplets collected at Basel, Switzerland, Proc. WGC2010 (submitted)
  2. Y. Mukuhira, H. Asanuma, H. Nozaki, H. Niitsuma, D. Wyborn, M. Haring., Analysis of microseismic events with larger magnitude collected at Cooper Basin, Australia and Basel, Switzerland, Proc. WGC2010 (submitted)
  3. H.Asanuma, Y. Kumano, Y. Kenmoku, Y. Kawamura, H. Niitsuma, D. Wyborn, M. Haring, Estimation of stimulation process of HDR/EGS reservoirs by analysis of microserismic multiplets, Proc. RE2010 (submitted)
  4. Y. Mukuhira, H. Asanuma, H. Nozaki, H. Niitsuma, D. Wyborn, M. Haring., Characteristics of microseismic events with large magnitude collected while stimulation of geothermal reservoirs at Cooper Basin, Australia and Basel, Switzerland, Proc. RE2010 (2010) (submitted)
  5. K. Tamakawa, H. Asanuma, N. Soma, H. Niitsuma, Principles of a seismic reflection method using AE multiplets as a source, Proc. RE2010 (2010)(submitted)
  6. M. Ikegami, E. Sekikawa, H. Moriya, H. Asanuma, H. Niitsuma, Appropriate operation and its advantages of geothermal heat pump system in a high geothermal gradient and high thermal conductivity area, Proc. RE2010 (2010)
  7. H. Asanuma, Y. Mukuhira, H. Niitsuma, M. Haring., Investigation of physics behind large magnitude microseismic events observed at Basel, Switzerland, Proc. 2nd European Geothermal Review (2010)(submitted)
  8. H. Asanuma, Y. Kawamura, H. Niitsuma, D. Wyborn, Integrating microseismic multiplet and source parameter analyses to define EGS reservoir structure: Cooper Basin, Australia, Trans. GRC, (2010)(submitted)
  9. Y. Mukuhira, H. Asanuma, H. Niitsuma, M. Haring, N. Deichmann, Estimation of source parameter of microseismic events with large magnitude collected at Basel, Switzerland in 2006, Trans. GRC, 34 (2010)(submitted)

2009

  1. H. Asanuma, Y. Kumano, H. Niitsuma, D. Wyborn, U. Schanz, M.Haring, Evaluation of coherency of AE signals in the time and frequency domains, Journal of Acoustic Emission, (2009)(submitted)
  2. H. Asanuma, Y. Kenmoku, H. Niitsuma, D. Wyborn, Interpretation of reservoir creation process at Cooper Basin by microseismic multiplet analysis, Trans. GRC, 33, 149-153 (2009)(PDF)
  3. Y. Mukuhira, H. Asanuma, H. Niitsuma, M. Haring, N. Deichmann, Investigation of relationship of pore pressure to large microseismic events with large collected at Basel, Switzerland in 2006, Trans. GRC, 33, 331-335(2009)(PDF)
  4. H. Asanuma, K. Ono, H. Niitsuma, Simulation of a ground source heat pump system with an expander-driven primary pump, Trans. GRC, 33, 557-559 (2009)(PDF)
  5. H. Asanuma, Y. Kenmoku, Y. Kawamura, H. Niitsuma, D. Wyborn, Estimation of response of fracture system to hydraulic stimulation by induced microseismic multiplet analysis, Eos Trans. AGU, 90(52), Fall Meet. Suppl., Abstract S32B-03 (2009)(PDF)
  6. H. Asanuma, Y. Kenmoku, Y. Kawamura, Y.Kumano, H. Niitsuma, D. Wyborn, Mapping of fractured geothermal reservoir at Cooper Basin, Australia by microseismic multiplets, Proc. 15th Formation Evaluation Symposium of Japan, K, (2009)(PDF)
  7. Y. Kumano, H. Asanuma, H. Niitsuma, M. Haring, N. Deichmann, Interpretation of fracture network system within the hydraulically stimulated geothermal reservoir at Basel Switzerland by microseismic multiplet analysis, Proc. 15th Formation Evaluation Symposium of Japan, H, (2009)(PDF)
  8. Y. Mukuhira, H. Asanuma, H. Niitsuma, M. Haring, N. Deichmann, Characteristics of microseismic events with large magnitude collected while stimulation of geothermal reservoir at Basel, Switzerland, Proc. 15th Formation Evaluation Symposium of Japan, I, (2009)(PDF)

2008

  1. K. Nemoto, H. Moriya, H. Niitsuma and N. Tsuchiya, Mechanical and hydraulic coupling of injection-induced slip along pre-existing fractures, Geothermics,37,(2008),157-172
  2. H. Moriya, Precise arrival-time detection of polarized seismic waves using the spectral matrix, Geophysical Prospecting,(2008)(in-press)
  3. H. Moriya, K. Asamori, I. Kitamura, H. Hotta, H. Ohara and T. Niizato, Estimation of crustal structure in Horonobe area, Hokkaido, Japan, by using Multiplet-clustering analysis, Progress in Acoustic Emission XIV, 415-422, (2008)
  4. H. Moriya, Spectral Matrix Analysis Method for the Detection of Polarized Wave Arrivals Using Confidence Levels, Eos Trans. AGU, 89(53), Fall Meet. Suppl., Abstract, S12B-01, (2008)
  5. H. Asanuma, Y. Kumano, H. Niitsuma, D. Wyborn, U. Schanz, M. Haring, Current status of microseismic monitoring techniques of the stimulation of HDR/HFR reservoirs, Proc. 2008 Australian Geothermal Energy Conference, 29-36 (2008)(PDF)
  6. H. Asanuma, Y. Kumano, H. Moriya, H. Niitsuma, U. Schanz, M. Haring, Identification of microseismic multiplets in the frequency domain and interpretation of reservoir structure at Basel, Switzerland, SEG Expanded Abstracts, 1451-1555, (2008)(PDF)
  7. H. Asanuma, Y. Kumano, H. Niitsuma, U. Schanz, M. Haring, Interpretation of reservoir structure from super-resolution mapping of microseismic multiplets from stimulation at Basel, Switzerland in 2006, Trans. GRC, 65-70 (2008)(PDF)
  8. Y. Mukuhira, H. Asanuma, H. Niitsuma, U. Schanz, M. Haring, Characterization of microseismic events with larger magnitude collected at Basel, Switzerland in 2006, Trans. GRC, 87-93 (2008)(PDF)
  9. H. Asanuma, A. Hotta, H. Niitsuma, Spatio-temporal analysis of multiplets in the aftershocks of the 2005 West Off Fukuoka earthquake, Eos Trans. AGU, 89(53), Fall Meet. Suppl., Abstract,S53A-1820, (2008)
  10. H.Shiraishi, H. Asanuma, An estimation technique of Rayleigh wave phase velocities using arrays with arbitrary geometry, Eos Trans. AGU, 89(53), Fall Meet. Suppl., Abstract, S53A-1869, (2008)
  11. H. Asanuma, Y. Kumano, H. Niitsuma, D. Wyborn, U. Schanz, M.Haring, Identification of AE multiplets in the time and frequency domains, Progress in Acoustic Emission XIV, 385-390 (2008)

2007

  1. Soma, N., H. Niitsuma, and R. Baria, Reflection imaging of deep reservoir structure based on three-dimensional hodogram analysis of multicomponent microseismic waveforms, JGR, 2007
  2. E. Majer, R. Baria, M. Stark, S. Oates, J. Bommer B. Smith, H. Asanuma, Induced Seismicity Associated with Enhanced Geothermal Systems, Geothermics, 36,3, 185-222 (2007)(PDF)
  3. Y. Kumano, H. Asanuma, A. Hotta, H. Niitsuma, U. Schanz, M. Haring, Reservoir structure delineation by microseismic multiplet analysis at Basel, Switzerland 2006, SEG Expanded Abstracts, 1271-1276 (2007)(PDF)
  4. H. Asanuma, Y. Kumano, A. Hotta, H. Niitsuma, U. Schanz, M. Haring, Analysis of microseismic events from a stimulation at Basel, Switzerland, Trans GRC, 265-270, (2007)(PDF)
  5. H. Moriya, G. Manthei, H. Niitsuma and J. Eisenblatter, Multiplet analysis for estimation of strucatures inside an AE cloud associated with a compression test of a salt rock specimen, Journal of Acoustic Emission,24,(2007),196-204

2006

  1. H. Asanuma, A. Hotta, G. Manthei, and H. Niitsuma, Relocation of AE events from a compression test of a rock salt specimen by Coherence Collapsing method, Proc. EAGE 2006 Annual Mtg. (2006) (in-press)(PDF)
  2. Y. Kumano, H. Moriya, H. Asanuma, H. Niitsuma, D. Wyborn Spatial distribution of coherent microseismic events at Cooper Basin, Australia, SEG Expanded Abstracts (2006)(submitted)
  3. Y. Kumano, H. Asanuma, H. Niitsuma, K. Tezuka, R. Kamitsuji, Delineation of reservoir structure at Yufutsu gas field, JAPAN by analysis of inducedmicroseismic multiplets, SEG Expanded Abstracts (2006)(submitted)
  4. H. Asanuma, M. Tanaka, H. Niitsuma, R. Sato, Development of an optical micro hydrophone for mass production, SEG Expanded Abstracts (2006)(submitted)
  5. H. Asanuma, T. Izumi, A. Hotta, A. Kato, N. Hirata and H. Niitsuma, Relocation of the aftershocks of 1995 Kobe earthquake by Coherence Collapsing method, Geophysical Research Letter, (submitted)
  6. Y. Kumano, H. Asanuma, H. Moriya, H. Niitsuma, K. Tezuka, D. Wyborn and R. Baria, Evaluation of fracture system by coherence analysis of induced microsesmic events, Proc. RE2006 (submitted)
  7. Y. Komaniwa, H. Moriya, H. Asanuma, H. Niitsuma, Application of an integrated renewable energy system simulator for rural and mountainous area in Tohoku Region, Japan, Proc. RE2006 (submitted)
  8. K. Kudo, H.Kubota, H. Asanuma, H. Niitsuma, Movable storage of compressed snow for cooling system of office and house, Proc. RE2006 (2006)(submitted)
  9. H. Asanuma, S. Tagami, H. Niitsuma, A geothermal heat pump system powered by non-stationary renewable energy, Proc. RE2006 (submitted)
  10. H. Asanuma, K. Utetsu, H. Niitsuma, Feasibility study on introduction of renewable energy system to a new campus of Tohoku University, Japan, Proc. RE2006 (submitted)
  11. H. Niitsuma, M. Ikegami, gEnergy In My Yardh: A concept of renewable energy usage for a sustainable civilization, Proc. RE2006 (2006)(submitted)
  12. M. Ikegami, H. Niitsuma, The old renewable energy system and its sustainability in Yumoto-Onsen district, Fukushima Prefecture, Japan, Proc. RE2006 (2006)(submitted)
  13. H. Asanuma, H. Nozaki, H. Niitsuma, D. Wyborn, Behavior of large induced seismic events at Cooper Basin HFR site, Australia, Proc. RE2006 (submitted)
  14. H. Asanuma, H. Nozaki, T. Uhara, H. Niitsuma, R. Baria and D. Wyborn, Spatial and temporal distrbution of larger seismic events at European and Australian HDR sites, Proc. Stanford Geothermal Workshop, 359-363, (2006)
  15. R.Baria, R.Jung, T.Tischner, D.Teza, J.Baumgaertner, B.Dyer, T.Hettkamp, J.Nicholls, S.Michelet, B.Sanjuan, N. Soma , H. Asanuma, J. Garnish, Creation of an HDR/EGS reservoir at 5000 m depth at the European HDR project, Proc. Stanford Geothermal Workshop, 364-371, (2006)
  16. H. Moriya, K. Tanaka and H. Niitsuma, Shear-wave splitting detected by using downhole triaxial seismic detector during dilation of artificial subsurface fracture, Geophysical Journal of International,164,(2006),401-410
  17. H. Moriya, T. Fujita, H. Niitsuma, J. Eisenblatter and G. Manthei, Analysis of fracture propagation behavior using hydraulically induced acoustic emissions in the Bernburg salt mine, Germany, International Journal of Rock Mechanics and Mining Sciences,43,(2006),49-57

2005

  1. H. Asanuma, T. Izumi, A. Hotta, A. Kato, H. Niitsuma, N. Hirata, Application of the Coherence Collapsing relocation method to the aftershocks of 1995 Kobe earthquake, Eos Trans. AGU, 86(52), Fall Meet. Suppl., Abstract S53C-04 (CDROM)
  2. H. Shiraishi, T. Matsuoka, H. Asanuma, Direct estimation of the Rayleigh wave phase velocity in microtremors, Eos Trans. AGU, 86(52), Fall Meet. Suppl., Abstract S42A-01 (CDROM)
  3. Y. Yoshida, H. Kakuma, H. Asanuma, and H Niitsuma, A linear model based noise evaluation of a capacitive servo-accelerometer fabricated by MEMS, IEICE Electronics Express, (2005), 2, 6, 1-7 (PDF file)
  4. H. Asanuma, T. Izumi, H. Niitsuma, R. Baria, and D. Wyborn, Principles of the Coherence Collapsing Relocation Method and its Application to Induced Microseismicity, Proc. The Eleventh Formation Evaluation Symposium of Japan, I, (2005)
  5. H. Asanuma, H. Nozaki, H. Niitsuma and D. Wyborn, Interpretation of microseismic events with larger magnitude collected at Cooper Basin, Australia, Trans. GRC, 29, 87-91, (2005)(PDF)
  6. Y. Kumano, H. Moriya, H. Asanuma, D. Wyborn, H. Niitsuma, Estimation of detailed reservoir structure at Cooper Basin HDR field, Australia, by using microseismic multiplet, Trans. GRC, 29, 93-97 (2005)(PDF)
  7. Y. Komaniwa, H. Moriya, H. Asanuma, H. Niitsuma, Development of simulator for evaluation of dynamic behavior of integrated renewable energy system with geothermal heat pump, Trans. GRC, 29, 71-75, (2005)(PDF)
  8. Y. Yoshida, H. Kakuma, H. Asanuma, and H Niitsuma, A linear model based noise evaluation of a capacitive servo-accelerometer fabricated by MEMS, IEICE Electronics Express, (2005), 2, 6, 1-7
  9. H. Asanuma, T. Izumi, H. Niitsuma, R. Baria, and D. Wyborn, gApplication of Coherence Collapsing Relocation Method to Induced Microseismicity Collected at European and Australian Hot Dry Rock Sitesh, Proc. AGU/SEG/SABS/AAS 2005 Joint Assembly, S41D-01, (2005)(CDROM)
  10. H. Asanuma, T. Izumi, H. Niitsuma, R. Baria, and D. Wyborn, Principles of the Coherence Collapsing Relocation Method and its Application to Induced Microseismicity, Proc. The Eleventh Formation Evaluation Symposium of Japan, (2005)(in-press)
  11. H. Asanuma, T. Izumi, H. Niitsuma, R. Jones, and R. Baria,Delineation of Reservoir Structure by the Coherence Collapsing Relocation Technique of Microseismicity, Proc WGC2005 (2005)(CDROM)
  12. H. Asanuma, N. Soma, H. Kaieda, Y. Kumano, T. Izumi, K. Tezuka, H. Niitsuma, and D. Wyborn, Microseismic Monitoring of Hydraulic Stimulation at the Australian HDR Project in Cooper Basin, Proc. WGC 2005 (2005)(CDROM)
  13. H. Asanuma, Y. Kumano, T. Izumi, N. Soma, H. Niitsuma, and R. Baria, Monitoring of Reservoir Behavior at Soultz HDR Field by Super-Resolution Microseismic Mapping, Proc. WGC 2005 (2005)(CDROM)
  14. H. Asanuma, H. Niitsuma, T. Nakata, Y. Niibori, H. Moriya, and Y. Komaniwa, The Role of Geothermal Energy in the Locally Distributed Renewable Energy Sytem (EIMY: Energy In My Yard), Proc. WGC 2005 (2005)(CDROM)
  15. R. Baria, S. Michelet, J. Baumgaertner, B. Dyer, A. Gerard, T. Hettkamp, D. Teza, N. Soma, H. Asanuma, J. Garnish, Creation and Mapping of 5000 m deep HDR/HFR Reservoir to Produce Electricity, Proc. WGC 2005 (2005)(CDROM)
  16. N. Soma, T. Takehara, H. Asanuma, H. Niitsuma, R. Baria, S. Michelet, and D. Wyborn, Automatic wave picking technique for multi-component microseismicity and its practical application to onsite analysis in HDR development, Proc. WGC 2005 (2005)(CDROM)
  17. H. Moriya, H. Niitsuma and R. Baria, Multiplet analysis for estimation of critical pore-pressure of fractures inside geothermal reservoir, Proc. World Geothermal Congress 2005, CD-ROM, (2005)
  18. Y. Kumano, H. Moriya and H. Niitsuma, Estimation of radiation mechanism of AE multiplet observation while hydraulic fracturing in HDR reservoir, Proc. World Geothermal Congress 2005, CD-ROM, (2005)
  19. K. Evans, H. Moriya, H. Niitsuma, R. H. Jones, W. S. Phillips, A. Genter, J. Sausse, R. Baria, Microseismicity and permeability enhancement of hydro-geologic structures during massive fluid injection into granite at 3km depth at the Soultz HDR site, Geophysical Journal International, 160, 388-412, (2005)


2004

  1. H.Asanuma, Y. Kumano, T. Izumi, N. Soma, H. Kaieda, Y. Aoyagi, K. Tezuka, D. Wyborn and H. Niitsuma, Microseismic monitoring of a stimulation of HDR reservoir at Cooper Basin, Australia, GRC Transactions, 28, 191-195, (2004)
  2. N. Soma, T. Takehara, H. Asanuma, H. Niitsuma, R. Baria, and S. Michelet, "Precise auto wave picking technique for on site microseismic monitoring in Hot Dry Rock development", GRC Transactions, 28, 239-244, (2004)
  3. H.Asanuma, Y. Ogasawara, N. Soma, H. Niitsuma, and R. Baria, Reflection imaging of deep HDR reservoir at Soultz by the traixial drill-bit VSP, Trans. GRC, 28, 197-200, (2004)
  4. H.Asanuma, T. Izumi, Y. Kumano, N. Soma, H. Niitsuma, R. Baria, and S. Michelet, Data acquisition and analysis of microseismicity from simulation at Soultz in 2003 by Tohoku University and AIST, Japan, Trans. GRC, 28, 187-190, (2004)
  5. H. Asanuma, S. Takashima and H. Niitsuma, Development of a prototype of a fiber-optical PTF tool, Proc. The Tenth Formation Evaluation Symposium of Japan, o, (2004)
  6. H.Asanuma, H. Ohishi, and H. Niitsuma, Development of an optical micro AE sensor with an automatic tuning system, Progress in Acoustic Emission,(2004)(in-press)
  7. K. Ohnuma, H. Asanuma, H. Niitsuma, Application of three dimensional time-frequency coherency method to the reflection imaging in a tunnel, Proc., SEGJ Symposium, (2004) (submitted)
  8. H.Asanuma, Y. Kumano, T. Izumi, N. Soma, H. Kaieda, K. Tezuka, D. Wyborn and H. Niitsuma, Passive seismic monitoring of a stimulation of HDR geothermal reservoir at Cooper Basin, Australia, SEG 2004 Expanded Abstracts, 556-559, (2004)(PDF-file)
  9. R.Jones and H. Asanuma, The tetrahedral geophone configuration: geometry and properties, SEG 2004 Expanded Abstracts, 9-12, (2004)(PDF file)
  10. S. Takashima, H. Asanuma and H. Niitsuma, A prototype of a fiber-optical downhole measurement system of pressure, temperature and flow, SEG Expanded Abstracts, 278-281, (2004)(PDF file)
  11. H.Asanuma, H. Ohishi, and H. Niitsuma, Automatic tuning of an optical ultrasonic microsensor based on the Fabry-Perot interferometer, Proc 9th International Conference on Optical MEMS and Their Applications,72-73, (2004)(PDF file)
  12. N. Soma, M. Utagawa, M. Seto and H. Asanuma, Application of the tri-axial drill-bit VSP method To drilling for geological survey in civil engineering, Exploration Geophysics, 35, No.1, 70-79, (2004)
  13. N. Soma, M. Utagawa, M. Seto, A. Cho and H. Asanuma, Estimation of subsurface structure by an application of seismic while drilling technique to civil engineering, International Journal of Rock Mechanics and Mining SciencesC41C165-173 (2004)
  14. S. Takashima, H. Asanuma and H. Niitsuma, A water flowmeter using dual fiber Bragg grating sensors and cross-correlation technique, Sensors and Actuators A:Physical, 116, 66-74 (2004)(PDF file)
  15. R. Jones and H. Asanuma, gOptimal Four Geophone Configuration, Vector Fidelity and Long-Term Monitoring,h Proc. EAEG Meeting, (CROM)(2004)(PDF file)
  16. N. Soma, H. Asanuma, H. Kaieda, K. Tezuka, D. Wyborn and H.Niitsuma, gOn site mapping of microseismicity at Cooper basin, Australia HDR project by the Japanese team,h Proc. Stanford Geothermal workshop (2004)
  17. R.Baria, S.Michelet, J.Baumgaertner, B.Dyer, A.Gerard, J.Nicholls, T.Hettkamp, D.Teza, N.Soma, H.Asanuma, gMicroseismic monitoring of the worldfs largest potential HDR reservoirh, Proc. Stanford Geothermal workshop (2004)


2003

  1. H. ASANUMA, S. HASHIMOTO, S. TANO, S. TAKASHIMA, M. NISHIZAWA, H. NIITSUMA and Y. SHINDO gDevelopment of Fiber-optical Microsensors for Geophysical Useh, Proc. IEEE The 3rd International Workshop on Scientific Use of SubmarineCables and Related Technologies (2003)(CDROM) (PDF file)
  2. K. Nemoto, H. Moriya, K. F. Evans, M. Nakatani and H. NiitsumaCEffect of normal stress and slip velocity on acoustic emission activity associated with shear slip, Proc. 28th Workshop on Geothermal Reservoir Engineering, Stanford University, (2003) (CD-ROM).
  3. H. Moriya, S. Miyano, H. Niitsuma and R. Baria, Estimation of fine scale structures in Soultz HDR reservoir by using microseismic multiplets, Proc. 28th Workshop on Geothermal Reservoir Engineering, Stanford University, 2003 (CD-ROM).
  4. N. Soma, M. Utagawa, M. Seto, A. Cho and H. Asanuma, Estimation of subsurface structure by applying a seismic while drilling technique in civil engineering, ISRM (in-press)
  5. Hiroshi Asanuma, Tanemoto Izumi, Hiroaki Niitsuma, Rob Jones, and Roy Baria,gDevelopment of Coherence Collaping method and its application to microseismicity collected at Soultzh GRC Transactions 2003 (submitted)
  6. Shin ITO, Kazuo HAYASHI, Hiroshi ASANUMA and Hiroaki NIITSUMA, "Fracture characterization by using resonance of penny-shaped fluid-filled crack model in the Higashi-Hachimantai Field, Japan", GRC Transactions 2003 (submitted)

2002

  1. H. Moriya, G. Manthei, S. Mochizuki, H. Asanuma, H. Niitsuma, R. Jones and J. Eisenblatter, "Collapsing method for delineation of structures inside AE cloud associated with compression test of salt rock specimen," Proc 14th Int. AE Symposium, 2002, (in-press)
  2. H. Niitsuma, H. Moriya, H. Asanuma, K. Evans, R. Jones, R. ung and R. Baria, "Hydraulically created permeable structures in the Soultz HDR site by super resolution seismic mapping techniques," Proc. 24th NZ Geothermal Workshop, 2002, (in-press)
  3. H. Asanuma, S. Mochiduki, K. Nakazato, N. Soma, H. Niitsuma and R. Baria, Relocation of Microseismicity from a Stimulation of a Deep Reservoir at Soultz by a Variation of the Collapsing Method, Trans. Geothermal Resources Council, 26, (2002), 209 - 214
  4. N. Soma, H. Niitsuma and R. Baria, Deep Sub-vertical Structure at Soultz Hot Dry Rock Site Estimated by Reflection Technique Using Multi-component Acoustic Emission Events, Trans. Geothermal Resources Council, 26, (2002), 255 - 260
  5. H. Moriya, S. Miyano and H. Niitsuma, Fracture System and Stress Field of Soultz Deep Reservoir Estimated by Multiplet-clustering Analysis of Induced Microseismic Events, Trans. Geothermal Resources Council, 26, (2002), 229 - 233
  6. N. Soma, M. Utagawa, M. Seto, and H. Asanuma, "Downhole multi-component measurement of seismic signal while drilling and its application to estimation of subsurface structure," Rock Engineering Problems and Approaches in Underground Construction, 747-754 (2002)
  7. N. Soma, H. Niitsuma and R. Baria ,Evaluation of Subsurface Structure at Soultz Hot Dry Rock Site by the AE Reflection Method in Time-frequency Domain Pure Applied Geophysics, 159, (2002), 543 - 562
  8. H. Moriya, K. Nakazato, H. Niitsuma and R. Baria , Detailed Fracture System of the Soultz-sous-Forets HDR Field Evaluated Using Microseismic Multiplet Analysis [Pure Applied Geophysics, 159, (2002), 517 - 541]
  9. H. Asanuma, T. Kizaki and H. Niitsuma, Analysis of seismic waves propagated through a pressurized fracture by the 3D-TFC method, SEG Expanded Abstracts 2385-2388,(2002)(PDF file)

2001

  1. H. Moriya, K. Nakazato, K.F.Evans, H. Niitsuma, R.H.Jones and R. Baria, Evaluation of the Soultz HDR system by precise mapping techniques of induced microseismic event, GRC Transactions, 187-190, 2001
  2. H. Asanuma, S. Mochizuki, K. Nakazato, N. Soma, H. Niitsuma and R. Baria, 2001, Data acquisition and analysis of microseismicity from simulation of deep reservoir at Soultz by the MTC/MURPHY international collaborative project, GRC Transactions, 161-166, 2001
  3. H. Asanuma, and H. Murphy, 2001, The Post-MTC International Collaborative Project for Multidisciplinary Understanding of Reservoir Physics, GRC Transactions,209-212, 2001
  4. P.Starzec, M. Fehler, R. Baria and H. Niitsuma, "Spatial Correlation of Seismic Slip at the HDR-Soultz Geothermal Site: Quantative Approach," Bull. Seismc. Soc. Am., 90 (6), (2000), 1528 - 1534
  5. H. Asanuma, S. Hasihmoto, G. Suzuki, H. Niitsuma, and M. Esashi "Optical interference type micro hydrophone fabricated by micromachining," SEG 2001 Expanded Abstracts, 45-47, (2001)(PDF file)
  6. H. Asanuma, J. Takayama and H. Niitsuma, "Discrimination of coherent waves by a time-frequency representation of 3D hodogram and application to microseismic reflection method," SEG Expanded Abstracts 424-427 (2001)(PDF file)
  7. H. Asanuma, M. Nishizawa, G. Suzuki, Y. Yoshida, H. Niitsuma and M. Esashi "Miniaturized silicon capacitive accelerometer for downhole seismic measurement", Proc. ASME InterPACK01, 2001, (CDROM)(PDF file)
  8. Samuelsson, J., Sato, K., Soma, N. and Niitsuma, H., "Using the AE reflection method to interpret the deeper structures of the Kakkonda Geothermal Field, Japan." Proc. 5th SEGJ International Symposium, p. 283-287.
  9. M. Fehler, A. Jupe, and H. Asanuma, More Than Cloud: New technologies for characterizing reservoir structure using induced seismicity, The Leading Edge, SEG, March 2001,20, 3 324-328 (PDF file)
  10. Hiroshi Asanuma, Manabu Ishimoto, Robert Jones, Hiroaki Niitsuma, and W.S Phillips, "A variation of the collapsing method to delineate structures inside a microseismic cloud ," BSSA, 91, 1,154-160 (2000)
  11. Hashimoto, T., SuzukiCG., Asanuma, H., Niitsuma, H., and Esashi, M., Development of optical interference type micro hydrophone using micro machining technologies, Abst. 7th Well Logging Symposium of Japan, P, 2001.
  12. Saito, J., and Niitsuma, H., Deveolopment ofa doppler borehole televiewer system to evaluate fluid flow distribution around subsurface fractures Abst. 7th Well Logging Symposium of Japan, O, 2001.
  13. Nishizawa, M., Yoshida, Y., Niitsuma, H., and Esashi, M., Development of miniaturized 3-component downhole seismic detector using micro machined silicon capacitive accelerometer Abst. 7th Well Logging Symposium of Japan, S, 2001.

2000

  1. K. Hirata, H. Niitsuma and M. Esashi, Silicon micromachined fiber-optic accelerometer for downhole seismic measurement, Trans. IEE Japan, 120-E, 576-581,
  2. Hiroshi Asanuma, Hakusei Liu, Hiroaki Niitsuma,and Roy Baria, Comparison of reflection image by the traixial drill-bit VSP at Soultz HDR field with geological information, Transactions GRC,
  3. Hiroshi Asanuma and Hugh Murphy, The more-than-cloud and successor projects: international research on fracture mapping and hdr/hwr reservoir development: second year accomplishments, Transactions GRC,
  4. Hiroshi Asanuma, Manabu Ishimoto, Robert Jones and Hiroaki Niitsuma, "Identification of structures inside AE/microseismic cloud in HDR reservoir and relocation by Collapsing method," Proc. WGC2000, (in CD-ROM)(PDF file)
  5. Hiroshi Asanuma, Hakusei Liu, Hiroaki Niitsuma,and Roy Baria"Charactreization of HDR reservoir by seismic signal while drilling," Proc. WGC2000, (in CD-ROM)
  6. H. Murphy, Hiroaki Niitsuma and Hiroshi Asanuma, The more-than-cloud and successor projects: international joint research on new mapping and HDR/HWR reservoir development technologies," Proc. WGC 2000 (in CD-ROM)(PDF file)
  7. H. Moriya, H. Niitsuma and H. Kaieda, "Reevaluation of reservoir structure at Ogachi HDR field by precise source location of AE multiplet," Proc. WGC2000, (in CD-ROM)
  8. H. Moriya, K. Nakazato and H. Niitsuma, "Study of microseismic doublet/multiplet for evaluation of fracture system in Soultz HDR field," Proc. WGC2000, (in CD-ROM)
  9. H. Moriya, K. Nakazato and H. Niitsuma, "Study of microseismic doublet/multiplet for evaluation of fracture system in Soultz HDR field," Proc. WGC2000, (CD-ROM)
  10. Hiroshi Asanuma, Hakusei Liu, Hiroaki Niitsuma,and Roy Baria "Discrimination of polarization of reflected waves in the triaxial drill-bit VSP and imaging of subsurface structure at Soultz, France," SEG 2000 Annual Mtg., (PDF file)
  11. M. Nishizawa, H. Niitsuma and M. Esashi, "Miniaturized downhole seismic detector using micromachined silicon capacitive accelerometer," SEG 2000 Annual Mtg., (PDF file)
  12. K. Nagano and H. Niitsuma, "Dispersion analysis of crack-waves in an artificial subsurface fracture using two crack models", IEEE Trans. Geoscience and Remote Sensing, 38 (1), (2000), 3 - 11

1999

  1. N. Soma, K. Sato ans H. Niitsuma, "Estimation of Deep Geothermal Reservoirstructure by Use of the Acoustic Emission(AE) Reflection Method in Kakkonda Geothermal Field , Japan," Trans. Geothermal Resources Council, 23, 301 - 306 (1999)
  2. Hiroshi Asanuma, Manabu Ishimoto, Robert Jones and Hiroaki Niitsuma, "New microseismic relocation technique to estimate structures inside HDR reservoir," GRC Transactions, 243 - 246 (1999)
  3. Hiroshi Asanuma, Hakusei Liu, Hiroaki Niitsuma,and Roy Baria "Reflection imaging of HDR reservoir at Soults-sous-Forets using drill bits as a downhole seismic source," GRC Transactions, 247-252, (1999)
  4. H. Murphy, Hiroaki Niitsuma and Hiroshi Asanuma, "Results and next steps of the more-than-cloud and successor projects: international joint research on new mapping and HDR/HWR reservoir development technologies," GRC Transactions, 289-294 (1999)
  5. T. Miwa, M. Sato and H. Niitsuma, "Subsurface Fracture Measurement with Polarimetric Borehole Radar, "IEEE Transaction on Geoscience and Remote Sensing, 37 (2), 828 - 837, (1999)
  6. H. Abe, H. Niitsuma and H. Murphy,"Summary of Discussions, Structured Academic Review of HDR/HWR Reservoirs," Geothermics, 28, (4/5), 671 - 680 (1999)
  7. K. Hayashi and H. Niitsuma,"Progress in the HDR/HWR Projects at Tohoku University, Japan," Geothermics, 28 (4/5), 647 - 654(1999)
  8. Niitsuma H, Fehler M, Jones R, Wilson S, Albright J, Green A, Baria R, Hayashi K, Kaieda H, Tezuka K, Jupe A, Wallroth T, Cornet F, Asanuma H, Moriya H, Nagano K, Phillips W, Rutledge J, House L, Beauce A, Alde D, and Aster R: Current status of seismic and borehole measurements for HDR/HWR development, Geothermics, 28, 475-490, (1999)
  9. H.Asanuma, H.Liu, H.Niitsuma and R.Baria: "Identification of structures inside basement at Soultz-sobs-Foret (France) by the triaxial drill-bit VSP," Geothermics, 28, 355-376 (1999)
  10. Masayuki Tateno, Masaki Takahashi, Iwao Suzuki, Hiroaki Niitsuma, Hiroshi Asanuma and Toshihiro UchidaFgEstimation of deep reflectors using tri-axial drill-bit vsp in NEDO "Deep-seated geothermal reservoir survey" in Kakkonda, JapanhGeothermics, 27, 647-661, (1999)
  11. K.Tanaka, H.Moriya, H.Asanuma and H.Niitsuma: "Detection of traveletime delay caused by inflation of single artificial fracture," Geothermal Science and Technology, 6, 181-200, (1999)

1998

  1. Asanuma H., Liu H., Niitsuma H., and Baria R., "Downhole multipoint measurement of SWD at Soultz and characterization of subsurface structure in the basement" SEG Expanded Abstracts (1998)(in CDROM)
  2. Asanuma H., Takayama J. , and Niitsuma H., "Discrimination of coherent waves by a downhole double three component detector" SEG Expanded Abstracts (1998)(in CDROM)
  3. J. Takayama, H. Asanuma and H. Niitsuma, "Identification of reflected phase by time-frequency representation of coherency in a downhole double three component seismic measurement," 4th SEGJ/SEG International Symposium. 143-146, (1998)
  4. H. Asanuma, H. Liu, H. Niitsuma and R. Baria, "Imaging of inside structure of basement by the drill bit reflection method," 4th SEGJ/SEG International Symposium., 369-374 (1998)
  5. H. Moriya, K. Tanaka, H. Asanuma and H. Niitsuma, "Traveltime delays and micro shear-wave splitting in transmitted waves caused by pressurization of artificial single fracture," 4th SEGJ/SEG International Symposium, 97-104(1998)
  6. H. Niitsuma R. Baria, M. Fehler, A. Green, K. Hayashi, H. Kaieda and K. Tezuka, "Results and the Next Step of MTC Project: International Joint Research on New Mapping Technology for HDR/HWD," 4th International HDR Forum, (1998)
  7. H. Asanuma and H. Niitsuma, "The use of drill signal in HDR development," 4th International HDR Forum, (1998)
  8. N. Soma and H. Niitsuma, "AE reflection method for estimation of reservoir structure inside deep basement rock," 4th International HDR Forum, (1998)
  9. M. Nishizawa, G. Lim, H. Niitsuma and M. Esashi, "Development of silicon capacitive micro accelerometer for subsurface seismic measurement," SPWLA Japan Chapter (1998)
  10. S. Ebihara, M. Sato and H. Niitsuma, "Analysis of a Guided Wave along a Conducting Structure in a Borehole," Geophysical Prospecting, 46, 489 -505, (1998)
  11. A. Lesniak and H. Niitsuma , Time-frequency Coherency Analysis of Three-component Seismic Data for Arrival Detection," Geophysics, 63 (6), 1847 - 1857, (1998)
  12. P. Starzec, R. Jones, R. Baria and H. Niitsuma, "Spatial Analysis of Seismic Stress Drop at the HDR - Soultz Geothermal Site," Proc. 20th NZ Geothermal Workshop, 311 - 316, , (1998)
  13. H. Niitsuma and M. Nishizawa , "Potential of Subsurface Micro-sensing for HDR/HWR Development," Proc. 4th International HDR Forum, (1998)

1997

  1. N.Soma and H.Niitsuma,"Identification of structures within the deep geothermal reservoir of the Kakkonda field (Japan) by a reflection method using acoustic emission as a wave source," Geothermics, 26,1 43-64, 1997
  2. Takashi Miwa , Motoyuki Sato and Hiroaki Niitsuma, "Characterization of fracture surface by polarimetric borehole radar, "Proceedings of IEEE Antennas and Propagation Society International Symposium, 818-821, 1997.
  3. K. Tanaka, H. Moriya, H. Asanuma and H. Niitsuma:"Evaluation of traveltime delay and micro shear-wave splitting in transmitted wave during pressurization of an artificial single fracture", Proc. of 3rd Well Logging Symposium of Japan, Chiba, G, 1997
  4. K. Tezuka and H. Niitsuma:"Integrated Interpretaiton of Microseismic Clusters and Fracture System in Hijiori HDR Reservoir" , Proc. of 3rd Well Logging Symposium of Japan, Chiba, H, 1997
  5. S. Ebihara, M. Sato and H. Niitsuma:"Estimation of wave polarization in directional borehole radar measurement with the MUSIC algorithm", Proc. of 3rd Well Logging Symposium of Japan, Chiba, P, 1997
  6. T. Miwa, M. Sato and H. Niitsuma:"Calibration method using a direct coupling wave for single-hole polarimetric borehole radar", Proc. of 3rd Well Logging Symposium of Japan, Chiba, Q, 1997
  7. K. Tezuka and H. Niitsuma:"Integrated interpretation of microseismic clusters and fracture system in a Hot Dry Rock artificial reservoir", Abst., SEG 67th Annual Meeting, 1997
  8. A. Lesniak and H. Niitsuma:"Dispersion Analysis of Seismic Crosshole Data Using Time-frequency Coherency Function", Acta Geophysica Polonia, XLV, 129-140, 1997
  9. N.Soma, H.Niitsuma and R.Baria:"Estimation of deeper structure at the Soultz Hot Dry Rock field by means of reflection method using 3C AE as wave source," PAGEOPH 150, 661-676, 1997
  10. H. Moriya, H. Niitsuma, J.T. Rutledge and M. Fehler, "Estimation of regional in-situ stress field controlling subsurface fracture system by using microseismic multiplets" Proceedings ofthe International Symposium on Rock Stress, pp.247-252, 1997
  11. S. Ebihara, M. Sato and H. Niitsuma, "Target Estimation with the MUSIC Algorithm for Directional Borehole Radar," Proc. IEEE Antenna Propagation and Signal Processing International Symposium,1036 - 1039, (1997)
  12. A. Lesniak and H. Niitsuma, "Analysis of Scattered Waves Using Coherency Function," Proc. XXII General Assembly European Geophysical Society, C139, (1997)
  13. S. Ebihara, M. Sato and H. Niitsuma,"Estimation of Three-dimensional Coherent Source Positions with a Directional Borehole Radar by MUSIC Algorithm," Proc. 3rd Well Logging Symposium of Japan, 1036 - 1039, (1997)

1996

  1. Takashi Miwa , Motoyuki Sato and Hiroaki Niitsuma, " Rough surface anisotropy estimation by wideband polarimetric borehole radar ," Proc. of the International Symposium on Antennas and Propagation, 1065-1068, 1996.
  2. R.Stewart, R.Jones, H.Niitsuma, S.Sasaki, H.Kaieda "A reexamination of microseismic data from the Hijiori HDR project", 3rd International HDR forum, 1996.
  3. H.Niitsuma, "MTC Project: International collaboration to develop new microseismic mapping/imaging techniques for deep geothermal energy extraction," Proc. WS Acoustic Emission/Microseismic Activity in Geologic Structures and Materials, 1996
  4. H.Moriya and H.Niitsuma, "Doublet analysis for characterizing regional subsurface structures in three-component microseismic measurement," Proc. WS Acoustic Emission/Microseismic Activity in Geologic Structures and Materials, 1996
  5. N.Soma and H.Niitsuma, "Estimation of deep subsurface structure using 3C reflected AE, " Proc. WS Acoustic Emission/Microseismic Activity in Geologic Structures and Materials, 1996
  6. H.Moriya, J.T.Rutledge, H.Niitsuma and M.Fehler, "Evaluation of fracture system in Clinton County oil field, KY, by using microseismic multiplets," WS Induced Seismicity Abstract, 32-33, 1996
  7. N.Soma and H.Niitsma, "Reflection survey for geothermal field using 3C AE as wave source," WS on Induced Seismicity Abstract, 25-26, 1996
  8. H.Moriya and H.Niitsuma, "Subsurface stress field determination using multiplets in downhole three-component microseismic measurement," Proc. 2nd North American Rock Mechanics Symposium, 1996
  9. H. Niitsuma, "MTC Project: International collaboration to develop new microseismic mapping/imaging techniques for deep geotherma energy extraction", 3rd International HDR Forum, 1996.
  10. H.Moriya, H.Niitsuma and H.Kaieda,"Identification of reservoir structure and stress syate from hypocenter cloud in Ogachi HDR field, Japan, by using triaxial doublet analysis", 3rd International HDR Forum, 1996.
  11. K.Nagano and H.Niitsuma,"Crack stiffness from crack wave velocities," Geophy. Res. Let., 23, 689-692, 1996
  12. H. Moriya and H.Niitsuma,"Precise detection of P-wave in low S/N signal by using time-frequency representations of triaxial hodogram," Geophysics 61, 5, 1453-1466, 1996
  13. H.Asanuma, J. N. Park, H.Niitsuma and R.Baria, "Characterization of subsurface structure at Soultz-sous-Forets)France by triaxial drill-bit VSP," SEG Expanded Abstracts, 202-205, 1996
  14. K.Nagano, K. Sato and H. Niitsuma, "Polarization of crack waves along an artificial subsurface fracture," Geophys. Res. Lett. 23, 16, 2017-2020, 199
  15. K. Nagano and H. Niitsuma, "Transfer function from crack wave in an artificial subsurface fracture," Proc. 2nd North American Rock Mechanics Symposium, 1231-1235, 1996
  16. A. Lesniak and H.Niitsuma, "Resolution of time-frequency analysis for seismic crosshole measurement," Journal of Applied Geophysics, 35, 105-115, 1996
  17. S. Ebihara, M. Sato and H. Niitsuma, "Three-dimensional location of coherent sources using a borehole radar with a broadband conformal array," Proc. ISAP'96, 733-736, 1996
  18. S. Ebihara, M. Sato and H. Niitsuma, "Estimation of reflector position by a directional borehole radar using a cylindrical conformal array antenna," Proc. 6th International Conference on Ground Penetrating Radar 411-416, 1996
  19. T. Miwa, M. Sato and H. Niitsuma:"Measurement and characterization of subsurface fracture by polarimetric borehole radar", Proc. of 6th Intern. Conf. on Ground Penetrating Radar, Sendai, 377-381, 1996
  20. Y. Lu, M. Sato and H. Niitsuma:"Application of GPR in archaeology using boreholes", Proc. of 6th Intern. Conf. on Ground Penetrating Radar, Sendai, 499-504, 1996
  21. S. Ebihara, M. Sato and H. Niitsuma, "Estimation of reflector position by a directional borehole radar using a cylindrical conformal array antenna," Proc. 2nd Well Logging Symposium of Japan, 1-8, 1996
  22. A. Lesniak and H. Niitsuma,"Clustering similar AE events using the filtered waveform envelope," Proc. IAES 13, 133-140, 1996

1995

  1. H. Niitsuma, "New International Collaborative Project on Advanced Microseismic Mapping/Imaging Techniques for Geothermal Development," World Geothermal Congress, 803-805, 1995.
  2. H. Niitsuma, M. Sato, H. Asanuma, and H. Moriya, "Evaluation of Geothermal Reservoir Structures by New Downhole Seismic Technique," Proc. World Geothwrmal Congress, 793-798, 1995.
  3. H .Niitsuma, H. Moriya, and K. Nagano, "Calibration Method Using The Spectral Matrix for Downhole Triaxial Seismic Detectors," Acoustic Emission/Microseismic Activity in Geologic Structures and Materials, 19, 611-624, 1995.
  4. H. Asanuma, H. Niitsuma,"Triaxial Seismic Measurement while Drilling and Estimation of Subsurfce Structure," Geothermal Science & Technology, 31-51, 1995.
  5. H. Moriya, and H. Niitsuma, "Characterization of Subsurface Crack System by Combining Triaxial Doublets Analysis and Focal Mechanism Analysis," Geothermal Science & Technology, 123-145, 1995.
  6. K. Nagano, H. Saito, and H. Niitsuma, "Guided Waves Trapped in an Artificial Subsurface Fracture," Geothermal Science & Technology 1995.
  7. T.Miwa, M.Sato and H.Niitsuma, "Quantitative Characterization of Subsurface Crack by Polarimetric Borehole Radar," Proc. First Annual Well Logging Symposium of Japan, D1-8, 1995
  8. H.Niitsuma and Y.Inagaki, "Pulsed Doppler Borehole Televiewer to Estimate Permeability of Subsurface Fracture," Proc. First Annual Well Logging Symposium of Japan, K1-7, 1995
  9. A. Lesniak, H. Moriya and H. Niitsuma, "Time-Frequency Coherency Analysis of the Seismic Signals," Proc. 3rd SEGJ/SEG International Symposium, 94-101, 1995
  10. H. Moriya and H. Niitsuma, "Detection of Micro Shear-wave Splitting in Inflated Micro Crack Zone by Crosshole Three-component Seismic Measurement," Proc. 3rd SEGJ/SEG International Symposium, 55-62, 1995

1994

  1. H. Niitsuma, K. Tsuyuki, and H. Asanuma, "Discrimination of Split Shear Waves by Wavelet Transform, Canadian Journal of Exploration Geophysics, 29, 106-113, 1994.
  2. H. Moriya, K. Nagano, H. Niitsuma, "Precise Source Location of AE Doublets by Spectral Matrix Analysis of Triaxial Hodogram, Geophysics, 59, 36-45, 1994.
  3. H. Moriya, and H. Niitsuma, "Determination of Subsurface Stress Direction by Means of AE Doublet Source Location and Focal Mechanism Analysis," Progress in Acoustic Emission 7, The JapaneseSoc. for NDI, 481-486, 1994.
  4. N. Soma, and H. Niitsuma, "Discrimination of Reflected Wave from 3C AE Waveform and Estimation of Deeper Subsurface Structure in Geothermal Field, "Progress in Acoustic Emission 7, The Japanese Soc. for NDI, 475-479, 1994.
  5. K. Hisamatsu, H. Moriya, H. Asanuma, M. Sato, N. Shinohara, M. Tateno, and H. Niistuma, "Downhole Triaxial AE Measurement during Hydraulic Fracturing Test at Yunomori Site and Estimation of Dynamic Behavior of Subsurface Fracture, " Progress in Acoustic Emission 7, The JapaneseSoc. for NDI, 425-430, 1994.
  6. K. Nagano, and H. Niitsuma, "Guided Wave Propagation along a Fracture with Contact," Proc. 1st North American Rock Mechanics Symposium, 157-163, 1994.
  7. M. Sato, J. Fuziwara, M. Miyairi, K. Kasahara and H. Niitsuma , "Directional Induction Logging Method," Proc. 35th Annual Logging Symposium, AA1 - AA116, (1994)

1993

  1. M. Abe, H. Shina, and H. Niitsuma, "Longitudial wave velocity in hot water saturared rocks under high tmperature and pressure, Journal of the Geothermal Research Society of Japan, 15, 059-074, 1993.
  2. H. Niitsuma, K. Nagano, and K. Hisamatsu, "Analysis of acoustic emission from hydraulically induced tensile fracture of rock," Journal of Acoustic Emission, 11, 001-018, 12, 1993.

1992

  1. H.Asanuma and H.Niitsuma, "Triaxial inverse VSP uses drill bits as a downhole seismic source", SEG Expanded Abstract, 108-111, 1992.
  2. S. Nagashima, H. Moriya and H. Niitsuma, "Development and Calibration of Downhole Triaxial AE Detectors for Subsurface and Civil Engineering AE Measurements," Progress in Acoustic Emission 6 , 407 - 413, (1992)
  3. S. Okada and H. Niitsuma, "Subsurface AE Source Location by Multi Zone Modeling for Uncertain Velocity Structure," Progress in Acoustic Emission 6, 431 - 437, (1992)
  4. A. Miyazaki and H. Niitsuma, "Virtual Calibration Method for Neural Source Location in Subsurface AE Measurement," Progress in Acoustic Emission 6, 447 - 454, (1992)

1991

  1. M. Sato, N. Matsumoto and H. Niitsuma: "Evaluation of Geothermal Reservoir Cracks by Shear-Wave Splitting of Acoustic Emission", Geothermics 20 , 197-206, 1991
  2. H. Niitsuma and H. Saito: "Characterization of a subsurface artificial fracture by the triaxial shear shadow method", Geophysical Journal International, 107, 485-491, 1991
  3. H. Niitsuma and H. Saito: "Evaluation of the three-dimensional configuration of a subsurface artificial fracture by the triaxial shear shadow method", Geophysics, 56, 2118-2128, 1991

1990

  1. H. Asanuma and H. R. Hardy,Jr., "Acoustic emission associated with rock drilling tests under laboratory conditions", Progress in Acustic Emission-5, JSNDI, 430-435, 1990.
  2. H. ASANUMA, H. NIITSUMA and N. CHUBACHI, "An analysis of three dimensional AE Lissajou pattern during well-drilling and estimation of source direction", Progress in Acoustic Emission-5, 436-443, 1990.
  3. M. Abe, H. Shiina and H. Niitsuma , "Measurements of Velocity and Attenuation of Longitudinal Waves in Hot Water-saturated Rocks under Simulated Hydrothermal Environment," SEG Expanded Abstracts, 1, 820 - 822, (1990)

1989

  1. H. Niitsuma: "Downhole AE Measurement Technique and its Application to Geotherm al Fields", Jour. of Acoustic Emission, 7, 201-209, 1989
  2. K. Nagano, H. Niitsuma and N. Chubachi: "Automatic Algorithm for Tri-axial Hodogram Source Location in Downhole AE Measurement", Geophysics, 54, 508-513, 1989
  3. H. Niitsuma: "Fracture Mechanics Design and Development of HDR Reservoirs - Concept and Results of the ƒ”-Project, Tohoku University, Japan", Int. Jour. of Rock Mechanics, Mining Sciences & Geomechanics Abstracts, 26, 169-175, 1989
  4. M. Sato, R. Thierbach and H. Niitsuma ,Analysis of Borehole Radar in Cross-hole Mode," Proceedings of ISAP, 727 - 730, (1989)
  5. H. Moriya, K. Nagano and H. Niitsuma , Precise Estimation of AE Source Direction by Spectral Matrix Analysis ,"Progress in Acoustic Emission 5, 244 - 251, (1989)

1988

  1. H. Asanuma, H.Niitsuma, M. Sato AND N. Chubachi, "Characterization of rock formation by means of ae monitoring during well drilling", Progress in Acoustic Emission-4, JSNDI, 248-257, 1988.
  2. H. Niitsuma, N. Chubachi, M. Takanohashi and N. Doi: "AE Evaluation of Geothermal Reservoir Created by Natural and Artificial Stimulations in Kakkonda Field, Japan", Acoustic Emission, DGM Informationsgesellschaft mbH, 283-290, 1988
  3. H. Sekine, K. Hayashi and H. Niitsuma, "A New Concept of HDR Reservoir Systems in Sedimentary Rocks,"Energy-Sources Technology Conference & Exibition ASME Publication, Geothermal Energy, 17 - 24, (1988)
  4. M. Takanohashi and H. Niitsuma, "Reservoir Creation and Control by Utilizing Acoustic Emission Technique ,"Energy-Sources Technology Conference & Exibition ASME Publication, Geothermal Energy,409 - 414, (1988)
  5. K. Nagano, H. Niitsuma, M. Sato and N. Chubachi, "Confidence Evaluating Parameters for Automatic Source Location in Downhole AE Measurement," Progress in Acoustic Emission 4, 311 - 319, (1988)
  6. H. Niitsuma, K. Nakatsuka, N. Chubachi, and H. Yokoyama, "Downhole AE Measurement of a Geothermal Reservoir and its Application to Reservoir Control," Proc. 4th Conf. AE/MA Geol. Struc. Mat., 475 - 489, (1988)

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