Plate boundary slip associated with the 2003 Off‐Tokachi earthquake based on small repeating earthquake data
Plate boundary slip associated with the 2003 Off‐Tokachi earthquake based on small repeating earthquake data
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基于小重复地震数据的与 2003 年十胜外地震相关的板块边界滑移
DOI：
10.1029/2004gl022310
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发表时间：
2005
影响因子：
5.2
通讯作者：
K. Obara
中科院分区：
文献类型：
--
作者：
M. Matsubara;Y. Yagi;K. Obara
通过对震源区重复地震的分析，确定了与2003年日本北部东京外地震有关的板块边界滑移。从2000年10月1日至2004年5月31日，在余震区及周边地区共识别出251组重复地震，共666次。虽然该地区多次重复地震发生在主震之前，但也有许多地震发生在主震之后。重复性地震位于主要的余滑区，并向东南方向分布。根据这一分析，估计同震区以东和东南部地区在地震后三个月中经历了大约50厘米的滑动，而在地震前三年中滑动不到5厘米。重复的地震可以在陆基GPS分辨率较低的近海地区提供余震数据。
Plate boundary slip associated with the 2003 Off‐Tokachi earthquake, northern Japan is determined by analysis of repeating earthquakes in the source region. A total of 251 repeating earthquake groups consisting of 666 events are identified in and around the aftershock region from October 1, 2000 to May 31, 2004. Although a number of the repeating earthquakes in this region occurred before the main shock, there are many events that occurred after the main event. The repeating earthquakes are located in the major afterslip region and distributed to the southeast. Based on this analysis, it is estimated that the areas to the east and southeast of the coseismic area undergone approximately 50 cm of slip over three months following the earthquake, and less than 5 cm over the three years prior to the earthquake. Repeating earthquakes can provide afterslip data in offshore areas where resolution from land‐based GPS is poor.