苏门答腊地震对柴达木地方震的触发作用

基金项目:

国家油气专项:"柴达木盆地油气资源战略调查及评价"项目(编码XQ-2004-01)阶段性成果之一。

TRIGGERING OF LOCAL EARTHQUAKES IN THE QAIDAM BASIN BY THE SUMATRA EARTHQUAKE

1. Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100081;
2. Institute of Mineral Resource, Chinese Academy of Geological Sciences, Beijing 100037;
3. Graduate School of the Chinese Academy of Sciences, Beijing 100049;
4. Qinghai Oilfield Branch, PetroChina, Dunhuang 736200, Gansu

摘要: 2004年12月26日印度尼西亚苏门答腊西北海域发生40年来最强烈的地震,造成巨大伤亡和财产损失.大地震在4000km外的柴达木盆地西部地区狮子沟地震台阵网上有长达1000多秒的明显记录,也触发柴西地区地方震的发震频率在大地震之后一天内提高了10倍.从大地震触发的地方震活动分布来看,触发地震的发震断裂是英雄岭南侧花土沟断裂和红柳泉断裂.
- 苏门答腊地震 /
- 柴达木盆地 /
- 活动断裂
Abstract: A magnitude 9.0 earthquake,which was the strongest earthquake in the past four decades,occurred just off the northwest coast of Sumatra,Indonesia,on December 26,2004.It caused serious damage and casualties.This large earthquake left as long as more than 1000 seconds of records at the Shizigou seismograph station in the western part of the Qaidam basin a distance of 4000 km from the epicenter.It has also triggered the local seismic activity in the western Qaidam basin.The frequency of the local earthquakes in the day after the occurrence of the large earthquake was 10 times as high as it had been.From the distribution of the local seismic activity triggered by the large earthquake,the causative faults triggering the local earthquakes in the western Qaidam basin are the Huatugou fault and Hongliuquan fault on the southern side of the Yingxiong Range.
- Sumatra earthquake /
- Qaidam basin /
- active fault