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    May 18

    Inglewood Earthquake M4.7

    Earthquake Strikes! 

    最近美国灾事连连,连土地公公也要闹一闹。昨晚8:35,我吃完饭上床小憩,正迷迷瞪瞪的时候,就感觉床开始摇晃。立即把我吓醒了,赶紧下床站住,定定神后就听到窗外(开窗)似乎有大卡车开过的轰隆隆的重低音,仔细听又不是,房子到处都在吱吱嘎嘎响。正担心是不是会有更大的振动时,就感觉振动停了。赶紧上网找USGS的地震报告,居然还没出来,按F5两次后出来了。刚开始报告是5.0级,发生在8:39pm PDT,两个小时后调整为4.7级。震中在Lennox,距离LAX两公里,距离downtown约十五公里。算是我经历的离震中最近的一次地震了。幸好震源深度比较大(15公里)、持时比较短(15秒)。主震后又发生多次余震,我感受到两次,最大一次8:45pm PST,3.1级。捣乱的是著名的Newport - Inglewood断层,这条曾导致了1933年6.4级Long Beach地震的断层可能会诱发最大7.4级的强烈地震。不过这条长约55英里的断层并非著名的有可能导致“The Big One”的San Andreas断层。这是继3月23号里氏3.8级Orange County地震后一个月内南加州第二次有感地震,也是继去年7月29日Chino Hills里氏5.5级地震后南加第二次近似破坏性地震,并进一步显示南加州地震带进入活跃期。
     
    【05/19/09添加】5月19日下午3点49分,距离主震第二天后,在几乎同样的地点爆发了强度4.1级的迄今为止最大余震。

    参考:
     
     
     
    延伸阅读:
    下面的视频介绍了San Andreas断层和"The Big One"。 
     

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    媛媛 刘wrote:
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    May 19

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