Five centuries of tsunamis and land-level changes in the overlapping rupture area of the 1960 and 2010 chilean earthquakes
Five centuries of tsunamis and land-level changes in the overlapping rupture area of the 1960 and 2010 chilean earthquakes
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1960年和2010年智利地震重叠破裂区五个世纪的海啸和地面变化
DOI：
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发表时间：
2014
期刊：
影响因子：
--
通讯作者：
T. Dura
中科院分区：
文献类型：
--
作者：
L. Ely;M. Cisternas;R. Wesson;T. Dura
智利中南部的地质和历史记录结合在一起，提供了一种手段来解决有关巨型逆冲断裂斑块的稳定性以及俯冲带某一特定地段的地震和海啸之间预计的变化范围等一般性问题。提鲁瓦河河口(38.3°S)记录了过去450年来在公元1960年(MW9.5)和2010年(MW8.8)两次大俯冲带地震的重叠破裂带内发生的四次大海啸和同震地平面变化。提鲁瓦河上游2公里处的沙层代表了2010年和1960年的海啸以及两次历史性的海啸，最有可能发生在公元1751年和1575年。这些地震期间不同的地平面变化可能表明，在重叠破裂带内，巨型逆冲上的滑动在走向和倾角方向上的空间分布都不同，1751年和2010年Tirua的抬升可能是由于滑动向陆地延伸得更远，深度比1575年和1960年更深，后者表现为下沉或变化不大。
A combination of geological and historical records from south-central Chile provides a means to address general questions about the stability of megathrust rupture patches and the range of variation expected among earthquakes and tsunamis along a particular stretch of a subduction zone. The Tirua River estuary (38.3°S) records four large tsunamis and coseismic land-level changes over the past 450 years within the overlapping rupture zones of the great subduction-zone earthquakes of A.D. 1960 (Mw 9.5) and 2010 (Mw 8.8). Sand layers 2 km up the Tirua River represent the 2010 and 1960 tsunamis and two historical tsunamis, most likely in A.D. 1751 and 1575. Differing land-level changes during these earthquakes likely denote differences in the spatial distribution of slip on the megathrust in both the strike and dip directions within the overlapping rupture zone, with the uplift at Tirua in 1751 and 2010 probably caused by slip extending farther landward and to greater depth than in 1575 and 1960, which showed subsidence or little change.
重建古地震形变，1：1960 年和 2010 年智利大地震的现代类比
影响因子：
4
作者：
Garrett E
通讯作者：
Garrett E