Vertical deformation through a complete seismic cycle at Isla Santa Maria, Chile
Vertical deformation through a complete seismic cycle at Isla Santa Maria, Chile
复制标题
智利圣玛丽亚岛完整地震周期的垂直变形
DOI:
10.1038/ngeo2468
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发表时间:
2015
影响因子:
18.3
通讯作者:
Moreno
中科院分区:
文献类型:
--
作者:
Wesson;Melnick;Cisternas;Moreno
Individual great earthquakes are posited to release the elastic strain energy that has accumulated over centuries by the gradual movement of tectonic plates,. However, knowledge of plate deformation during a complete seismic cycle—two successive great earthquakes and the intervening interseismic period—remains incomplete. A complete seismic cycle began in south-central Chile in 1835 with an earthquake of about magnitude 8.5 (refs , ) and ended in 2010 with a magnitude 8.8 earthquake. During the first earthquake, an uplift of Isla Santa María by 2.4 to 3 m was documented,. In the second earthquake, the island was uplifted by 1.8 m. Here we use nautical surveys made in 1804, after the earthquake in 1835 and in 1886, together with modern echo sounder surveys and GPS measurements made immediately before and after the 2010 earthquake, to quantify vertical deformation through the complete seismic cycle. We find that in the period between the two earthquakes, Isla Santa María subsided by about 1.4 m. We simulate the patterns of vertical deformation with a finite-element model and find that they agree broadly with predictions from elastic rebound theory. However, comparison with geomorphic and geologic records of millennial coastline emergence,reveal that 10–20% of the vertical uplift could be permanent.
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影响因子:
5.8
作者:
J. Freymueller
通讯作者:
J. Freymueller
影响因子:
5.2
作者:
Bookhagen, B.;Echtler, H. P.;Spencer, J. Q. G.
通讯作者:
Spencer, J. Q. G.
影响因子:
4
作者:
D. Melnick;M. Cisternas;M. Moreno;R. Norambuena
通讯作者:
R. Norambuena
DOI:
--
发表时间:
--
期刊:
影响因子:
--
作者:
L. Salazar
通讯作者:
L. Salazar
DOI:
--
发表时间:
1967
期刊:
影响因子:
--
作者:
Mary Blewitt;G. Ritchie
通讯作者:
G. Ritchie