Earth tides can trigger shallow thrust fault earthquakes
Earth tides can trigger shallow thrust fault earthquakes
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DOI：
10.1126/science.1103961
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发表时间：
2004-11-12
期刊：
影响因子：
56.9
通讯作者：
Tanaka, S
中科院分区：
文献类型：
--
作者：
Cochran, ES;Vidale, JE;Tanaka, S
我们显示了最强潮汐的发生与浅层逆冲地震的发生之间的相关性。地震发生率随潮汐应力的变化与背景发生率相差3倍。当我们假设地壳的摩擦系数为mu = 0.4时，发现相关性最高，尽管我们看到mu在0.2和0.6之间有很好的相关性。我们的研究结果量化了施加应力对地震触发的影响，这是理解地震成核和一次地震触发其他地震的级联的关键因素。
We show a correlation between the occurrence of shallow thrust earthquakes and the occurrence of the strongest tides. The rate of earthquakes varies from the background rate by a factor of 3 with the tidal stress. The highest correlation is found when we assume a coefficient of friction of mu = 0.4 for the crust, although we see good correlation for mu between 0.2 and 0.6. Our results quantify the effect of applied stress on earthquake triggering, a key factor in understanding earthquake nucleation and cascades whereby one earthquake triggers others.