High Sensitive Geomagnetic Field Observation at the Area where Induced Earthquakes feequently occur by the 3.11 Tohoku Earthquake
| Project/Area Number |
24560507
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Measurement engineering
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| Research Institution | Tohoku University |
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Principal Investigator |
TAKEUCHI Nobunao 東北大学, 理学(系)研究科(研究院), 客員研究者 (80005420)
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| Co-Investigator(Kenkyū-buntansha) |
OKUBO Kan 首都大学東京, 大学院システムデザイン研究科, 准教授 (90336446)
ISOGMI Shinji 福島工業高等専門学校, 一般教科, 准教授 (10586853)
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| Project Period (FY) |
2012-04-01 – 2015-03-31
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| Project Status |
Completed (Fiscal Year 2014)
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| Budget Amount *help |
¥5,330,000 (Direct Cost: ¥4,100,000、Indirect Cost: ¥1,230,000)
Fiscal Year 2014: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2013: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2012: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
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| Keywords | 地震極微小磁気変化 / 高温超電導SQUID磁力計 / 地震断層運動 / 地磁気連続観測 / 3.11東北大地震 / 地震断層運動磁気変化 / 地震地磁気観測 / 東北大地震誘起地震 / オーバーハウザー磁力計 / いわき観測点 / 細倉観測点 / いわき地震観測 |
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| Outline of Final Research Achievements |
We successfully observed “co-faulting” geomagnetic field changes due to piezomagnetic effects caused by earthquake rupturing in 2008 Iwate-Miyagi Nairiku earthquake of M7.2 using the flux-gate magnetometers. This observed geomagnetic variation signal accompanying earthquake fault movement is very small, approximately several hundred pico-tesla.
Since March 2012 we have performed long-term high sensitive geomagnetic observations using high-temperature superconducting-quantum-interference-device (HTS-SQUID) magnetometer system Unit1 at Iwaki observation site in Fukushima, Japan. Additionally, since October 2014, we have also introduced the new HTS- SQUID magnetometer system Unit2. A high-resolution accelerometer is also installed at observation point. At a result, we successfully observed the geomagnetic field change signal associated with the earthquake of M5.9 (on September 20, 2013) using our high-sensitive magnetometer Unit1 system.
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Report
(4 results)
Research Products
(16 results)
