Postseismic coastal uplift in southern Chile

Postseismic coastal uplift in southern Chile
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智利南部震后海岸隆起

DOI:
10.1029/92gl00210
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发表时间:
1992
影响因子:
5.2
通讯作者:
E. Lorca
E. Lorca
中科院分区:
地球科学1区
文献类型:
--
作者:
S. Barrientos;G. Plafker;E. Lorca

文献摘要

被引文献

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蒙特港的潮汐测量仪记录参考了塔尔卡瓦诺的一台气象仪,表明该地区在1960年MW=9.5地震后发生了一次大规模(至少75厘米)的地震后隆起。1989年在1968年以前测量的相同地点进行的现场观测与验潮仪记录一致。震后高程变化被模拟为同震断层向下延伸上的蠕变传播的结果。对于30°E的断层倾角,最小平方误差表明断层的蠕变速度为4-6公里/年,滑动幅度为3-5m。
Tide gage records at Puerto Montt, referenced to a mareograph in Talcahuano, indicate a large (at least 75 cm) postseismic uplift of the region following the 1960 Mw = 9.5 event. Field observations carried out in 1989 at the same locations of previous measurements in 1968 are consistent with tide gage records. The postseismic elevation changes are modeled as the result of propagating creep on the downdip extension of the coseismic fault. For a 30° E fault dip, minimum square error indicates a fault creep velocity of 4–6 km/yr and slip amplitude of 3–5 m.