Multidisciplinary Research on Fault Activity in the Western Part of the North Anatolian Fault Zone (The Second Phase)
| Project/Area Number |
63041054
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| Research Category |
Grant-in-Aid for Overseas Scientific Survey.
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| Allocation Type | Single-year Grants |
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| Section | Field Research |
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| Research Institution | Tokyo Institute of Technology |
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Principal Investigator |
HONKURA Yoshimori Faculty of Science, Tokyo Institute of Technology, associate professor, 理学部, 助教授 (00114637)
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| Co-Investigator(Kenkyū-buntansha) |
西上 欽也 京都大学, 防災研究所, 助手 (00189276)
IIO Yoshihisa Faculty of Science, Kyoto University, assistant, 理学部, 助手 (50159547)
OSHIMAN Naoto College of Humanities and Sciences, assistant, 文理学部, 助手 (70185255)
IKEDA Yasutaka Faculty of Science, University of Tokyo, assistant, 理学部, 助手 (70134442)
MIYAKOSHI Jun'ichiro Faculty of Liberal Arts, Tottori University, Professor, 教養部, 教授 (60032116)
NISHIGAMI Kinya Disaster Prevention Institute, Kyoto University, assistant
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| Project Period (FY) |
1988 – 1989
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| Project Status |
Completed (Fiscal Year 1989)
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| Budget Amount *help |
¥12,600,000 (Direct Cost: ¥12,600,000)
Fiscal Year 1989: ¥3,600,000 (Direct Cost: ¥3,600,000)
Fiscal Year 1988: ¥9,000,000 (Direct Cost: ¥9,000,000)
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| Keywords | North Anatolian Fault / Seismic Observation / Trench / Active Fault / Geomagnetic and Electric Field / Radon / Earthquake Prediction / 地震予知 |
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| Research Abstract |
The aim of this research is to investigate fault activity in the western part of the North Anatolian Fault Zone. First we made seismic observations to examine microseismic activity in the so-called seismic gap area. The result of observations at 9 stations during three months indicates that seismic activity is very low at the southern section, whereas activity is high in the northern section. We also made a trenching work in order to reveal the recurrence rate of major earthquakes. It turned out that major earthquakes occur every 300-400 years. This rate is extremely short compared with active faults in Japan. Geomorphological work also delincated the extension of an active fault which has so far been vague. Electric and magnctic work disclosed anomalies associated with fault structure and based on the anomalies, continuous measurements of the geomagnetic field has been made at 7 stations. So far slight anomalous changes seem to have been detected in association with slight increase in seismic energy. Continuous electric measurements have also been made in the vicinity of the fault. Radon concentration in soil gas has been monitored routinely at some sites near the active fault. We complied these results in a report. We have been requested to send copies of this report to scientists over the world since we reported the results at an international meeting on earthquake prediction.
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Report
(1 results)
Research Products
(11 results)
