摘要
分析了新疆石河子M5.4地震前震中250km范围内定点形变的观测资料,认为从2002年5月到震前,单测项异常随时间起伏,多台异常在时间上连续发展并呈增加趋势,震前20天位于震中附近的台站出现临震突变;异常在空间呈现由西向东、由南向北,逐渐向震中区发展的态势。与1996年沙湾M5.2地震前的形变异常进行比较,认为存在较大的差异。
The observational datum of fixed-point deformation around the Shihezi earthquake 250km before the Shihezi M5.4 earthquake were analyzed, the result showed, from May of 2002 to the earthquake occured, single measure items was up and down following the time, but the anomalies of many stations were continuum, and the anomalies increased, there appeared the impending earthquake anomalies 20 days before the earthquake in the earthquake center; in space, the anomalies closed up the earthquake region from west to east, south to north. There were many differences with Shawan M5. 2 earthquake on deformation anomalies.
出处
《内陆地震》
2005年第3期241-248,共8页
Inland Earthquake
基金
中国地震局"十五"国家攻关项目2004BA601B010103资助.
关键词
石河子M5.4地震
形变异常
异常演化
Shihezi M5.4 earthquake
Deformation anomaly
Anomalous evolvement
