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首页> 外文期刊>Earth, planets and space: EPS >A feasibility test of CMT inversion using regional network of broad-band strong-motion seismographs for Nnear-distance large earthquakes
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A feasibility test of CMT inversion using regional network of broad-band strong-motion seismographs for Nnear-distance large earthquakes

机译：利用宽带强运动地震仪区域网络对近距离大地震进行CMT反演的可行性测试

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摘要

When a large earthquake occurs in and around the Japanese Islands, we should immediately determine the size and the fault geometry of the earthquake to mitigate earthquake disasters. Broad-band, strong-motion data of near-distance large earthquakes are used to investigate the possibility of CMT inversion. We perform a moment tensor inversion using the data sets of the 1993 Hokkaido Nansei-oki earthquake (MJMA7.8), the 1994 Hokkaido Toho-oki earthquake (MJMA8.1) and the 1994 Sanriku Haruka-oki earthquake (MJMA7.5). The accuracy of the solutions is examined by comparison with the solutions derived from global data sets, which reveals that the mechanism and moment magnitude are quite adequate for the purpose. Numerical experiments are made to analyze the influence of the source finiteness on the solutions. The numerical experiments suggest that the influence of the source finiteness on the mechanism retrieval is smaller than that on the moment retrieval. We suggest the installation of a network system of broad-band, strong-motion seismographs in the Japanese Islands
机译：当日本群岛及其周围发生大地震时，我们应立即确定地震的规模和断层几何形状，以减轻地震灾害的发生。近距离大地震的宽带，强运动数据用于研究CMT反演的可能性。我们使用1993年北海道Nansei-oki地震（M JMA 7.8），1994年北海道Toho-oki地震（M JMA 8.1）的数据集进行矩张量反演和1994年三陆Haruka-oki地震（M JMA 7.5）。通过与从全局数据集得出的解进行比较，检查了解的准确性，这表明该机构和力矩幅值足以满足此目的。进行了数值实验，以分析源有限性对解的影响。数值实验表明，源有限性对机构检索的影响小于对矩检索的影响。我们建议在日本群岛上安装宽带强地震仪网络系统

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