2012 Fiscal Year Final Research Report
Observational study of electrical potential change in vicinity to micro earthquakes using high-sensitive antenna
| Project/Area Number |
22340122
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Solid earth and planetary physics
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| Research Institution | The University of Tokyo |
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Principal Investigator |
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| Co-Investigator(Renkei-kenkyūsha) |
NAKATANI Masao 東京大学, 地震研究所, 准教授 (90345174)
UYESHIMA Makoto 東京大学, 地震研究所, 准教授 (70242154)
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| Project Period (FY) |
2010 – 2012
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| Keywords | 自然現象観測・予測 / 地震現象 |
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| Research Abstract |
In order to measure electric potential change associated with mining induced seismic events, we developed high-sensitive borehole antennas and installed them in a deep gold mine in South Africa in 2010. In addition, we installed borehole magnetometers which were newly developed in 2012. We evaluated the amplitude of electric potential change as a function of earthquake magnitude and source distance assuming rock contains randomly oriented quartz. Electromagnetic field changes were frequently observed when the seismic wave arrived. We discussed the waveformscomparing seismograms.
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