菲律宾—印度尼西亚东部地震S波走时异常初探

英文篇名：Travel time anomaly analysis of S-waves in earthquakes at Philippines-eastern Indonesia
中文刊名：地震地磁观测与研究
英文刊名：Seismological and Geomagnetic Observation and Research
作者：王九洋 ; 吴小平 ; 焦明若 ; 李广平
英文作者：Wang Jiuyang ; Wu Xiaoping ; Jiao Mingruo ; Li Guangping ; University of Science and Technology of China ; Dalian Seismic Station ; Earthquake Administration of Liaoning Province
中文关键词：菲律宾—印度尼西亚东部 ; S波前驱震相 ; 单台定位 ; 地震目录
英文关键词：philippines-eastern indonesia ; precursor phase of S-waves ; single location ; earthquake catalog
出版日期：2013-12-25
机构：中国科学技术大学;大连地震台;辽宁省地震局;
年：2013
期：Z3
出版单位：地震地磁观测与研究

摘要

大连地震台在实测中,经常观测到来自菲律宾—印度尼西亚东部一带的地震S波较理论到时提前约数秒到达。2002年至2011年,记录到该地区145例具有此种显著异常的震例。该现象与台基无关,全国地区均可观测到。震例分析发现,可观测到该现象与未观测到明显异常的台站在全球范围内大致呈四象限分布,造成该异常现象的原因可能与震源过程有关。
In the observation of earthquakes from the Philippines-eastern Indonesia area in Dalian Seismic Station,the S-waves often arrived several seconds ahead of the theoretical arriving time.Waves from this area observed by Dalian Seismic Station from 2002 to 2011 were collected,from which 145 cases with anomalous travel time of S-waves were selected.This phenomenon is unrelated with the base;the whole country areas can observe the anomaly.The stations that can or not observe this phenomenon distributed in a four-quadrant pattern on the Earth.It is suggested that the origin of this phenomenon should be related with the source process.

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