Researcher Database

OGASAWARA Hiroshi

Department / Course Research Organization of Science and Technology

Title / Position Professor

Papers
1.	2019/06	2019 status report: Drilling into seismogenic zones of M2.0–M5.5 earthquakes in South African gold mines (DSeis project) │ Proceedings of the 9th International Congress on Deep and High Stress Mining │ ,pp.375-384 (Co-authored)
2.	2019/01	Integration of underground mapping, petrology, and high-resolution microseismicity analysis to characterise weak geotechnical zones in deep South African gold mines │ International Journal of Rock Mechanics and Mining Sciences │ 114,pp.79-91 (Co-authored)
3.	2022/07	Physical property studies to elucidate the source of seismic reflectivity within the ICDP DSeis seismogenic zone: Klerksdorp goldfield, South Africa │ International Journal of Rock Mechanics and Mining Sciences │ 155 (Co-authored)
4.	2022/07/08	Characteristics of fault rocks within the aftershock cloud of the 2014 Orkney earthquake (M5.5) beneath the Moab Khotsong gold mine, South Africa │ Geophysical Research Letters │ 49 (14),pp.e2022GL098745 (Co-authored)
5.	2023/01/01	Hydrogeochemical and isotopic signatures elucidate deep subsurface hypersaline brine formation through radiolysis driven water-rock interaction │ Geochimica et Cosmochimica Acta │ 340,pp.65-84 (Co-authored)
6.	2014/09	Observational studies of the rock mass response to mining in highly stressed gold mines in South Africa │ Proceedings of 7th International Congress on Deep and High Stress Mining, Sudbury, Canada, 16-18 September 2014 │ ,pp.123-137 (Co-authored)
7.	2009/07/31	Semi-controlled earthquake-generation experiments in deep gold mines, South Africa - monitoring at closest proximity to elucidate seismogenic process │ 61 (Supplement),pp.S563-S573 (Co-authored)
8.	2012	An attempt to constrain the stress and strength of a dyke that accommodated a ML2.1 seismic event. │ ,pp.436-450 (Co-authored)
9.	2002/03	Microseismicity Induced by Heavy Rainfall around Flooded Vertical Ore Veins │ Pure and Applied Geophysics │ 159,pp.91-109 (Co-authored)
10.	2002	Post-seismic effects of an M7.2 earthquake and microseismicity in an abandoned, flooded deep mine. │ Pure and Applied Geophysics │ 159,pp.63-90 (Co-authored)
11.	2023/01/11	[Keynote] ICDP drilling into the upper fringe of the aftershock zone of the 2014 Orkney M5.5 earthquake that ruptured an almost entire depth range of the West Rand Group │ Abstracts, GeoCongress │ (Co-authored)
12.	2022/07/28	Life in a hypersaline subsurface ecosystem analogous to subsurface martian environments │ Abstracts, the 5th South Africa-Japan University Forum, 28-29 July 2022 │ ,pp.87-92 (Co-authored)
13.	2022/07/28	Studies of earthquakes and deep life in deep South African gold mines │ Abstracts, the 5th South Africa-Japan University Forum, 28-29 July 2022 │ ,pp.83-86 (Co-authored)
14.	2022/04/05	Stress state in the source region of Mw2.2 earthquake in a deep gold mine in South Africa determined from borehole cores │ Pure and Applied Geophysics │ 179 (5),pp.1679-1700 (Co-authored)
15.	2022/04	Micro- and macro-structural investigations of faulting in deep South African gold mines │ Proc. 10th Int. Symp. Rockburst and Seismicity in Mines 2022 │ ,pp.RASIM22-0307 (Co-authored)
16.	2022/03/15	A trial evaluation of rock core DCDA absolute differential stress measurement for routine quantitative mining hazard assessment in deep underground high stress mines │ ,pp.259-264 (Co-authored)
17.	2021/12/01	[Keynote lecture] South African gold mines as invaluable laboratory deep underground for geoscience │ 15th AfricaArray Scientific Meeting Abstracts │ (Sole-authored)
18.	2021/11/04	ICDP DSEIS project (Drilling into seismogenic zones of M2.0-5.5 earthquakes in South African gold mines) │ DEEP 2021 - the 2021 International Symposium on Deep Earth Exploration and Practice │ (Co-authored)
19.	2021/01	The effect of a gouge layer on rupture propagation along brittle shear fractures in deep and high-stress mines. │ International Journal of Rock Mechanics and Mining Sciences │ 137 (Co-authored)
20.	2020/11/14	[Invited] The 2014 Orkney M5.5 sinistral earthquake below a deep South African gold mine and the post-earthquake drilling investigation from 2.9km depth │ 2020 International Forum on Bohang Earthquake │ (Co-authored)
21.	2020/05/05	[Session Convener selected Highlight] The seismogenic zones of an M2.0-5.5 earthquakes successfully recovered in deep South African gold mines: the outcomes and the follow-up plan │ Europ. Geophys. Union 2020 │ (Co-authored)
22.	2019/12/09	Abiotic (Prebiotic?) Organic Chemistry in a Potentially Ancient Hypersaline Brine: New Insights on the Limits of Microbial Life Inhabiting 3.1 km Deep Fracture Fluid in South Africa │ AGU 2019 fall meeting abstract │ ,pp.B11K-2202 (Co-authored)
23.	2019/11/05	Briny SLiMEs in the subsurface of Earth and Mars │ In Mars Extant Life: What’s Next? Conference Abstracts, Lunar and Planetary Institute, Houston │ (Co-authored)
24.	2019/06	In-situ stress around source faults of seismic events in and beneath South African deep gold mines │ Proceedings of the 9th International Congress on Deep and High Stress Mining, Symposium Series S98, Southern African Institute of Mining and Metallurgy │ ,pp.399-411 (Co-authored)
25.	2019/05	[Keynote lecture] Spatial variation in stress in seismogenic zones in South African gold mines │ Proceedings of the 2019 Rock Dynamics Summit in Okinawa, A specialized conference of ISRM │ ,pp.39-44 (Co-authored)
26.	2018/10	Emergence and disappearance of very small repeating earthquakes on a geological fault in a gold mine in South Africa │ Tectonophysics │ 747–748,pp.318-326 (Co-authored)
27.	2017/10/03	Drilling into seismogenic zones of M2.0-M5.5 earthquakes from deep South African gold mines (DSeis): establishment of research sites │ ISRM AfriRock - Rock Mechanics for Africa │ ,pp.237-248 (Co-authored)
28.	2017/10/03	Observational Studies in South African Mines To Mitigate Seismic Risks: Challenges and Achievements │ Proc. Afrirock Symposium 2017 (ISRM) │ ,pp.175-186 (Co-authored)
29.	2017/09/15	Call for Models—A Test Case for the Source Inversion Validation: The 2014 ML 5.5 Orkney, South Africa, Earthquake │ 88 (4) (Co-authored)
30.	2017/01	Estimate of the stress state of earthquake source region in a South African deep gold mining by diametrical core deformation analysis (DCDA) │ Proceedings of the 14th Symposium of Japan Rock Mechanics Society. │ (講演番号107),pp.1-6 (Co-authored)
31.	2015/11/18	Unexpectedly frequent occurrence of very small repeating earthquakes (–5.1 ≤ MW ≤ –3.6) in a South African gold mine: implications for monitoring intraplate faults │ Journal of Geophysical Research │ 120,pp.8478-8493 (Co-authored)
32.	2015/10	Delineation of large localized damage structures forming ahead of an active mining front by using advanced acoustic emission mapping techniques │ International Journal of Rock Mechanics and Mining Sciences │ 79,pp.157-165 (Co-authored)
33.	2015/07/14	Nucleation process of an M2 earthquake in a deep gold mine in South Africa inferred from on-fault foreshock activity │ Journal of Geophysical Research │ 120 (8),pp.5574-4495 (Co-authored)
34.	2015/03	Steady activity of microfractures on geological faults loaded by mining stress │ Tectonophysics │ 649,pp.100-114 (Co-authored)
35.	2015/02/13	Quasi-static slip patch growth to 20 m on a geological fault inferred from acoustic emissions in a South African gold mine │ Journal of Geophysical Research │ 120 (3),pp.1692-1707 (Co-authored)
36.	2015	Dynamic strain in a South African gold mine produced by the 2011 Tohoku Earthquake │ Proc. Int. Assoc. Geodesy Symp. │ (Co-authored)
37.	2014/06	BX CCBO in-situ stress measurements at earthquake prone areas in South African gold mines – a summary of mini-workshop on 13 Feb 2014 │ Proceedings of ARMA2014 │ ,pp.CD-ROM, paper no. 14-7438 (Co-authored)
38.	2014/05	In situ stress measurement at earthquake prone areas in South African gold mines │ Proceedings of the Sixth South African Rock Engineering Symposium 2014 │ ,pp.349-359 (Co-authored)
39.	2014/05	In-situ monitoring of rock mass response to mining in South African gold mines using the Ishii strainmeters │ Proceedings of the Sixth South African Rock Engineering Symposium 2014 │ ,pp.21-34 (Co-authored)
40.	2014/05	Observational studies in South African mines to mitigate seismic risks: a mid-term review of the five-year SATREPS project │ Proceedings of the Sixth South African Rock Engineering Symposium 2014 │ ,pp.241-250 (Co-authored)
41.	2013/09	In-situ monitoring and modelling of the rock mass response to mining: Japanese-South African collaborative research │ ,pp.51-60
42.	2013/09	Mapping seismic vulnerability in stopes in deep South African gold mines │ Proc. 8th Int. Symp. Rockburst and Induced Seismicity in Mines │ ,pp.387-393 (Co-authored)
43.	2013/09	Relating tilt measurements recorded at Mponeng gold mine, South Africa, to the rupture of an M2.2 event │ Proc. 8th Int. Symp. Rockburst and Induced Seismicity in Mines │ ,pp.67-73 (Co-authored)
44.	2013/08	Estimation of the stress state around the fault source of a Mw 2.2 earthquake in a deep gold mine in South Africa based on borehole breakout and core discing. │ ,pp.604-613
45.	2013/08	Loading conditions of geological faults in deep level tabular mines. │ ,pp.558-580
46.	2013	Estimation of the stress state around the fault source of a Mw 2.2 earthquake in a deep gold mine in South Africa based on borehole breakout and core discing. │ ,pp.604-613
47.	2013	Frequency–magnitude distribution of -3.7 < Mw < 1 mining-induced earthquakes around a mining front and b value invariance with post-blast time │ Pure and Applied Geophysics │ 171 (10),pp.2665-2684 (Co-authored)
48.	2013	Loading conditions of geological faults in deep level tabular mines. │ ,pp.558-580
49.	2013	Non-invasive method of estimation of stiffness of near surface material using surface wave │ Geotechnical and Geophysical Site Characterization4 (Coutinho & Mayne, eds), Taylor & Francis Group, London │ ,pp.1321-1325 (Co-authored)
50.	2013	Relating high-resolution tilt measurements to the source displacement of an M2.2 event located at Mponeng gold mine │ J. Southern African Inst. Min. Metallurgy │ 113 (10),pp.787-793 (Co-authored)
51.	2012/05	Trial of the BX conical ended borehole overcoring stress measurement technique │ Proceedings of the second Southern Hemisphere International Rock Mechanics Symposium, South African Institute of Mining and Metallurgy │ ,pp.169-179 (Co-authored)
52.	2012/03	Establishment of SATREPS experimental sites in South African gold mines to monitor phenomena associated with earthquake nucleation and rupture │ Proceedings of the sixth International Seminar on Deep and High Stress Mining, 23-30 March 2012, Perth, Australia (ed. Yves Potvin) │ ,pp.173-187 (Co-authored)
53.	2012	Detection of mining-induced fractures around a stope in Ezulwini gold mine, South Africa, by using AE events with similar waveforms │ ,pp.181-186
54.	2012	Temporal changes in attenuation of S waves through a fault zone in a South African gold mine │ Geophys. J. Int. │ 191 (3),pp.1317-1324 (Co-authored)
55.	2011	Multi-Channel Analysis of Surface Waves: Inversion Strategy │ Proceedings of the thirteenth International Conference on Civil, Structural and Environmental Engineering Computing │ (Co-authored)
56.	2010	Observational study to mitigate seismic risks in mines: a new Japanese - South African collaborative project │ The proceedings of the fifth International Seminar on Deep and High Stress Mining, 6-8 October, Santiago, Chile, Australian Centre for Geomechanics │ ,pp.215-226 (Co-authored)
57.	2009/11	Observation of numerous aftershocks of an Mw 1.9 earthquake with an AE network installed in a deep gold mine in South Africa │ Earth Planets Space │ 61,pp.e49-e52 (Co-authored)
58.	2009/09	JST-JICA SA research group, a Japanese - South African collaboration to mitigate seismic risks in deep gold mines │ Proceedings of 1st Hard Rock Safe Safety Conference, South African Institute of Mining and Metallurgy │ ,pp.115-134 (Co-authored)
59.	2009/03	南アフリカ金鉱山でみえてきた地震発生の詳細像 │ (72),pp.4-5 (Co-authored)
60.	2009	Observational study to mitigate seismic risks in mines: a new Japanese and South African collaborative project │ Proceedings of South African Geophysical Associaion Biennial Technical Meeting and Exhibition │ ,pp.73-79 (Co-authored)
61.	2007	Monitoring of rock mass behavior at the closest proximity to hypocenters in South African gold mines │ Scientific Drilling │ Special Issue (1),pp.88 (Co-authored)
62.	2007	Stress drops and radiated seismic energies of microearthquakes in a South African gold mine │ JGR │ 112 (B03305) (Co-authored)
63.	2006/06	Small slow-strain steps and their forerunners observed in gold mine in South Africa │ Journal of Geophysical Research │ 33 (L12304),pp.2006GL026507 (Co-authored)
64.	2006/03	Stress change prior to the major events in the 1989 earthquake swarm off the eastern Izu Peninsula │ Earth Planets Space │ 58 (3),pp.305-314 (Co-authored)
65.	2005/03	High-resolution Strain Monitoring During M~2 Events in a South African Deep Gold Mine in Close Proximity to Hypocentres, │ Proceedings of the 6th International Symposium on Rockburst and Seismicity in Mines (RaSim6) │ ,pp.385-391 (Co-authored)
66.	2005/03	Multidisciplinary Monitoring of the Entire Life Span of an Earthquake and its Practical Strategy in South African Gold Mines │ Proceedings of the 6th International Symposium on Rockburst and Seismicity in Mines (RaSim6) │ ,pp.393-398 (Co-authored)
67.	2005	Radiation efficiency and apparent stress of small earthquake in a South African gold mine │ ,pp.2004JB003221 (Co-authored)
68.	2002/12	Microearthquake scaling relationship using near-source, redundant, wide-dynamic-range accelerograms in a South African deep gold mine │ Seismogenic Process Monitoring (Ogasawara et al. eds.), Balkema │ ,pp.151-164 (Co-authored)
69.	2002/12	Temporal variation of seismic parameters associated with an Mw~2 event monitored at a 100~200 m distance │ Seismogenic Process Monitoring (Ogasawara et al. eds), Balkema │ ,pp.173-184 (Co-authored)
70.	2002/11	Pretrius fault, Mponeng mine, South Africa: seismic, strainmeter and displacement meter arrays │ ,pp.P159 (Co-authored)
71.	2002/09	Location and temporal variation of shear wave splitting in a South African gold mine │ Seismogenic Process Monitoring (Ogasawara et al. eds), Balkema │ ,pp.185-198 (Co-authored)
72.	2002/09	Review of the Semi-Controlled Earthquake Generation Experiments in South African Deep Gold Mines (1992-2001) │ Seismogenic Process Monitoring (Ogasawara et al. eds.), Balkema │ ,pp.119-150 (Co-authored)
73.	2002/06	Semi-controlled seismogenic experiments in South African deep gold mines │ J. South African Inst. Mining Metallurgy │ 102 (4),pp.243-250 (Co-authored)
74.	2002/03	A simple analogue experiment for understanding a power-law and a exponential decay in earthquake rate. │ Pure and Applied Geophysics │ 159,pp.309-343 (Sole-authored)
75.	2002	Near source observation of small initial phase generated by earthquakes in a deep gold mine in South Africa │ In Seismogenic Process Monitoring (Ogasawara et al. eds.), Balkema │ ,pp.165-171 (Co-authored)
76.	2001/09	Semi-controlled seismogenic experiments in South African deep gold mines │ Proceedings 5th International Symp. Rockburst Seismicity Mines │ ,pp.293-300 (Co-authored)
77.	2001/06	A quantitative interpretation of the well-tide observed in Chuo shaft of the old Ikuno mine, Hyogo, Japan │ 53,pp.325-335 (Co-authored)
78.	1999/03	An attempt of 10Hz continuous 3-dimensional strain monitoring on a source fault in a South African deep gold mine where M=2 event is promising │ Proceedings of the GSJ Workshop, Fault Rocks and Seismogenic Process - Deformation of Fault Materials: Field Observations, Laboratory Studies, and Modeling -, Geol. Surv. Japan Interim Report │ EQ (99/1),pp.81-84 (Co-authored)
79.	1999	The stress fluctuation monitored by seismic source parameters at about 200 m hypocenter distance prior to M2 event in a South African deep gold mine │ Proceedings of the GSJ Workshop, Fault Rocks and Seismogenic Process - Deformation of Fault Materials: Field Observations, Laboratory Studies, and Modeling -, Geol. Surv. Japan Interim Report │ EQ (99/1),pp.77-80 (Co-authored)
80.	1995/03	Observation of electric self-potential at a closed old mine │ (166) (Co-authored)
81.	1993	Observation of electric self-potential at a closed old mine │ Technical note of the National Research Institute for Earth Science and Disaster Prevention │ (157) (Co-authored)
82.	1992/04	Comprehensive observation system at old Ikuno mine for earthquake prediction │ (35),pp.1-12 (Co-authored)
83.	1992/04	Seismic Refraction experiments in the northern Kinki district, Japan (Part2) │ (35),pp.347-358 (Co-authored)
84.	1992	The flexure estimated from in-situ stress measurement and its relation to the tectonics │ Tectonophysics │ 201 (3) (Sole-authored)
85.	1991	Seismic refraction experiments in the northern Kinki district, Japan │ Annuals of the Disaster Prevention Research Institute Kyoto University │ (34B-1) (Co-authored)
86.	1990/10	Comprison of aftershocks of earthquake with AE that occurs after turning out gas stove and so on │ Proceedings of 10th International Acoustic Emission Symposium │ (Sole-authored)
87.	1990/08	Interpretation of in-situ depth gradient of horizontal stress: the flexure around plate boundaries │ EOS │ 71 (28) (Sole-authored)
88.	1989	A numerical procedure to estimate the flexure in the uppermost crust and the shear force at depth from in-situ stress measurements │ Journal of Physics of the Earth │ 37 (1) (Sole-authored)
89.	1989	The flexure in the uppermost crust and the shear force at depth estimated from in-situ stress measurements │ Journal of Physics of the Earth │ 37 (2) (Sole-authored)
90.	1988/11	A study on the flexure in the uppermost crust and the shear force at the depths │ 京都大学大学院理学研究科博士後期過程学位申請論文 │ (Sole-authored)
91.	1988/09	Temporal changes of electric self-potential differences observed at the old Ikuno mine (preliminary report) │ Earth Science Report of Collage of Libreral Arts and Sciences, Kyoto University │ 23,pp.､1 (Co-authored)
92.	1988/09	Repeated measurements of in-situ three-dimensional stress by hydraulic fracturing method in small boreboles -- Rokko-Suwayama test site -- │ Zishin2(Journal of Seis-mological Society, Japan) │ 41 (2) (Co-authored)
93.	1987	Observatin of natural ultramicro-fracturings at Ikuno Geophysical Observation Station (1) │ Zisin2(Journal of Seis-mological Society, Japan) │ ,pp.40 (Co-authored)
94.	1984	The accuracy of in situ measurements by │ Zishin2(Journal of Seis-mological Society, Japan) │ ,pp.357-367 (Co-authored)