| Project/Area Number |
12573005
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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 | 海外学術 |
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| Research Field |
固体地球物理学
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| Research Institution | KYOTO UNIVERSITY |
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Principal Investigator |
MORI James Jiro Disaster Prevention Research Institute professor, 防災研究所, 教授 (50314282)
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| Co-Investigator(Kenkyū-buntansha) |
SHIBUTANI Takuo Disaster Prevention Research Institute assistant, 防災研究所, 助手 (70187417)
SATAKE Kenji National Institute of Advanced Industrial Science and Technology Team Reader of Earthquake Hazard Assessment, 活断層研究センター, 地震被害予測研究チームリーダー
ANDO Masataka Department of Science Nagoya Univ. professor, 大学院・理学研究科, 教授 (80027292)
井口 正人 京都大学, 防災研究所, 助教授 (60144391)
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| Project Period (FY) |
2000 – 2002
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| Project Status |
Completed (Fiscal Year 2002)
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| Budget Amount *help |
¥12,800,000 (Direct Cost: ¥12,800,000)
Fiscal Year 2002: ¥1,400,000 (Direct Cost: ¥1,400,000)
Fiscal Year 2001: ¥2,600,000 (Direct Cost: ¥2,600,000)
Fiscal Year 2000: ¥8,800,000 (Direct Cost: ¥8,800,000)
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| Keywords | Rabaul Caldera / volcano, earthquake. / New Ireland / New Britain / Wetin fault / Radiated Energy / Earthquake Sources / Earthquake Moment / Weitin Fault / Weitin fault |
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| Research Abstract |
The specific investigations of this project include a three-dimensional study of the P-wave velocity structure of Rabaul Caldera which identifies a large magma body in the under the central area of the caldera that is the likely source for the recent historic eruption. Using P arrival time data from both natural earthquakes and explosions from the Rabaul Earthquake Location and Caldera Structure (RELACS) experiment, we were able to image a low-velocity body in the body of the caldera that is the likely a large magma body (Tanimura and Mori).
During the course of this study a great (Mw8.0) earthquake occurred on the transform fault east of Rabaul in the New Ireland area (Weitin-Kamdaru fault). The earthquake caused strong shaking in Rabaul and Kokopo, along with a 1 m tsunami in Rabaul Harbour. On New Ireland, which is very sparsely populated, there were observed surface offsets of the fault as large as 5.5 m. We wrote reports about the 2000 New Ireland Earthquake with a description of the earthquake (Itikarai) and a study of the earthquake source and subsequent triggering of two subsequent large earthquakes along the New Britain trench (Park and Mori).
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