| Budget Amount *help |
¥24,310,000 (Direct Cost: ¥18,700,000、Indirect Cost: ¥5,610,000)
Fiscal Year 2013: ¥6,630,000 (Direct Cost: ¥5,100,000、Indirect Cost: ¥1,530,000)
Fiscal Year 2012: ¥9,490,000 (Direct Cost: ¥7,300,000、Indirect Cost: ¥2,190,000)
Fiscal Year 2011: ¥8,190,000 (Direct Cost: ¥6,300,000、Indirect Cost: ¥1,890,000)
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| Outline of Final Research Achievements |
We introduce long-term precise geomagnetic observations using high-temperature-superconductor based superconducting-quantum-interference-device (HTS-SQUID) magnetometer system at the IWAKI observation site. By our past study, it was suggested that the geomagnetic variation signal accompanying fault movement, whose sources are the piezomagnetic effects, is very small, therefore development of a high-sensitive magnetometer system is very important. Our research group developed the HTS-SQUID magnetometer system for high-resolution observation of Earth’s magnetic field. Since 2012, we have observed 3 components of the geomagnetic field using a HTS- SQUID magnetometer at Iwaki observation site in Fukushima, Japan. The sampling interval of the magnetometer is 0.02 sec. The observation clock has been synchronized by use of GPS signals. An accelerometer is also installed at observation point. We have showed the feature of our HTS-SQUID magnetometer and evaluation results.
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