Obara Kazushige
National Research Institute for Earth Science and Disaster Prevention, Tenno-dai 3-1, Tsukuba, Ibaraki, 305-0006, Japan.
Science. 2002 May 31;296(5573):1679-81. doi: 10.1126/science.1070378.
Deep long-period tremors were recognized and located in a nonvolcanic region in southwest Japan. Epicenters of the tremors were distributed along the strike of the subducting Philippine Sea plate over a length of 600 kilometers. The depth of the tremors averaged about 30 kilometers, near the Mohorovic discontinuity. Each tremor lasted for at most a few weeks. The location of the tremors within the subduction zone indicates that the tremors may have been caused by fluid generated by dehydration processes from the slab.
在日本西南部的一个非火山区域识别并定位到了深部长期震颤。这些震颤的震中沿着菲律宾海板块俯冲带的走向分布，长度达600公里。震颤深度平均约为30公里，接近莫霍面。每次震颤持续时间最长为几周。俯冲带内震颤的位置表明，这些震颤可能是由板块脱水过程产生的流体引起的。
