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首页> 外文期刊>Pure and Applied Geophysics >Anomalous Seismicity and Accelerating Moment Release Preceding the 2001 and 2002 Earthquakes in Northern Baja California, Mexico
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Anomalous Seismicity and Accelerating Moment Release Preceding the 2001 and 2002 Earthquakes in Northern Baja California, Mexico

机译:墨西哥北下加利福尼亚州2001年和2002年地震之前的异常地震活动和加速矩释放

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摘要

— An algorithm recently developed by RUNDLE et al. (2002) to find regions of anomalous seismic activity associated with large earthquakes identified the location of an M w = 5.6 earthquake near Calexico, Mexico. In this paper we analyze the regional seismicity before this event, and a nearby M w = 5.7 event, using time-to-failure algorithms developed by BOWMAN et al. (1998) and BOWMAN and KING (2001a,b). The former finds the radius of a circular region surrounding the epicenter that optimizes the time-to-failure acceleration of seismic release. The latter optimizes acceleration based on the expected stress accumulation pattern for a dislocation source. Both methods found a period of accelerating seismicity in an optimal region, the size of which agrees with previously proposed scaling relations. This positive result suggests that the Rundle algorithm may provide a useful technique to identify regions of accelerating seismicity, which can then be analyzed using signal optimization time-to-failure techniques.
机译:— RUNDLE等人最近开发的算法。 (2002年)发现与大地震有关的异常地震活动区域,确定了墨西哥Calexico附近M = 5.6地震的位置。在本文中,我们使用BOWMAN等人开发的失效时间算法分析了该事件之前的区域地震活动以及附近的M w = 5.7事件。 (1998)和BOWMAN and KING(2001a,b)。前者找到了震中周围的圆形区域的半径,该半径优化了地震释放从破坏到破坏的时间。后者基于位错源的预期应力累积模式优化加速度。两种方法都发现了一个在最佳区域内加速地震活动的时期,其大小与先前提出的比例关系一致。这个肯定的结果表明,Rundle算法可能提供一种有用的技术来识别加速地震活动的区域,然后可以使用信号优化失效时间技术对其进行分析。

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