Determination of Focal Mechanisms of Microearthquakes and Estimation of the Stress Field in the Tanba Region
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Accession number;07A0041915
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| Title;Determination of Focal Mechanisms of Microearthquakes and Estimation of the Stress Field in the Tanba Region |
| Author;
OGASAWARA TOMOHIKO
(Kyoto Univ., Disaster Prev. Res. Inst., JPN)
KATAO HIROSHI
(Kyoto Univ., Disaster Prev. Res. Inst., JPN)
IIO YOSHIHISA
(Kyoto Univ., Disaster Prev. Res. Inst., JPN)
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Journal Title;Abstracts for Annuals. Disaster Prevention Research Institute, Kyoto University (CD-ROM)
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Journal Code:S0431B
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ISSN:
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VOL.;NO.49;PAGE.NO.49B,331-338(2006)
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| Figure&Table&Reference;FIG.13, TBL.1, REF.14 |
| Pub. Country;Japan |
| Language;Japanese |
| Abstract;We determined newly focal mechanisms of about 900 microearthquakes in the Tanba region, adjacent area of the 1995 Hyogo-ken Nanbu earthquake, using up/down sense of P-wave onset, and also analyzed regional stress field using the stress tensor inversion method. Average feature of focal mechanisms and the stress field was not changed by the Hyogo earthquake. But, southwestern areas in the Tanba region near the rupture of the Hyogo earthquake show the changes on P-axis azimuth and the stress field. These results are well corsistent with the theoretical stress pattern caused by the Hyogo earthquake. (author abst.) |
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