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首页> 外文期刊>Current Science: A Fortnightly Journal of Research >On the recurrence of great subduction zone earthquakes
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On the recurrence of great subduction zone earthquakes

机译：关于大俯冲带地震的再次发生

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摘要

The last decade has witnessed two unusually large tsunamigenic earthquakes. The devastation from the 2004 Sumatra-Andaman and the 2011 Tohoku-Oki earthquakes (both of moment magnitude >9.0) and their ensuing tsunamis comes as a harsh reminder on the need to assess and mitigate coastal hazards due to earthquakes and tsunamis worldwide. Along any given subduction zone, megathrust tsunamigenic earthquakes occur over intervals considerably longer than their documented histories and thus, 2004-type eventsmay appear totally ‘out of the blue’. In order to understand and assess the risk from tsunamis, we need to know their long-term frequency and magnitude, going beyond documented history, to recent geological records. The ability to do this depends on our knowledge of the processes that govern subduction zones, their responses to interseismic and coseismic deformation, and on our expertise to identify and relate tsunami deposits to earthquake sources. In this article, we review the current state of understanding on the recurrence of great thrust earthquakes along global subduction zones.
机译：过去十年见证了两次异常大的海啸地震。 2004年苏门答腊-安达曼（Sumatra-Andaman）地震和2011年东北-奥奇（Tohoku-Oki）地震（瞬时震级均大于9.0）造成的破坏和随之而来的海啸严峻地提醒人们，需要评估和减轻全球地震和海啸造成的沿海灾害。在任何给定的俯冲带上，特大推力海啸地震的发生间隔都比其记载的历史要长得多，因此，2004年类型的事件可能看起来完全是“破天荒”。为了了解和评估海啸的风险，我们需要了解海啸的长期发生频率和范围，其范围已超出记录的范围，而不仅仅是最近的地质记录。做到这一点的能力取决于我们对俯冲带控制过程的了解，对减震带和同震形变的反应，以及我们识别海啸沉积物并将其与地震源联系起来的专业知识。在本文中，我们回顾了对全球俯冲带大推力地震再发生的认识。

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