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首页> 外文期刊>Pure and Applied Geophysics >Anomalies of Seismic Activity and Transient Crustal Deformations Preceding the 2005 M 7.0 Earthquake West of Fukuoka
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Anomalies of Seismic Activity and Transient Crustal Deformations Preceding the 2005 M 7.0 Earthquake West of Fukuoka

机译：在福冈以西2005 M 7.0地震之前的地震活动和瞬时地壳形变异常

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摘要

If aseismic slip occurs on a fault or its deeper extension, both seismicity and crustal deformation around the source would be affected. Anomalous phenomena of this kind are revealed from earthquake occurrence data and geodetic records during a period of 10 years leading up to the March 2005 M 7.0 earthquake west of Fukuoka that occurred off the northern coast of Kyushu, Japan. Seismicity rate anomalies (quiescence and activation) took place relative to the rates expected by the ETAS model in a number of seismic zones in and around the Kyushu District. The seismic zone of the relative quiescence and activation consistently corresponds to the zone of the negative and positive ΔCFS (Coulomb failure stress change), respectively, assuming the precursory aseismic slips on the M 7.0 source fault. In addition, we consider the time series of geodetic baseline distances between permanent GPS stations in the Kyushu District for the same period, which also supports the possible precursory slips rather than the known slow slips beneath the Bungo Straight, off the eastern coast of Kyushu.
机译：如果在断层或其更深的延伸上发生抗震滑动，则震源和震源周围的地壳变形都会受到影响。从直到2005年3月日本九州北部沿海福冈以西7.0级地震发生的10年期间，地震发生数据和大地测量记录都揭示了这种异常现象。相对于ETAS模型在九州地区及其周围的多个地震带中所预期的速率，发生了地震速率异常（静止和激活）。假设M 7.0源断层有先验地震滑动，相对静止和激活的地震带分别分别对应于负和正ΔCFS（库仑破坏应力变化）的区域。此外，我们考虑了同一时期九州地区永久性GPS站之间的大地测量基线距离的时间序列，这也支持了可能的前体滑动，而不是九州东部沿海邦戈笔直下方的已知慢滑动。

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