Viscoelastic flow in the lower crust after the 1992 Landers, Californial earthquake

被引：157

作者：

Deng, JS ^{[1
]}

Gurnis, M ^{[1
]}

Kanamori, H ^{[1
]}

Hauksson, E ^{[1
]}

机构：

[1] CALTECH, Seismol Lab 252 21, Pasadena, CA 91125 USA

来源：

SCIENCE | 1998年 / 282卷 / 5394期

关键词：

D O I：

10.1126/science.282.5394.1689

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Space geodesy showed that broad-scale postseismic deformation occurred after the 1992 Landers earthquake. Three-dimensional modeling shows that afterslip can only explain one horizontal component of the postseismic deformation, whereas viscoelastic flow can explain the horizontal and near-vertical displacements. The viscosity of a weak, about 10-km-thick Layer, in the Lower crust beneath the rupture zone that controls the rebound is about 10(18) pascal seconds. The viscoelastic behavior of the lower crust may help to explain the extensional structures observed in the Basin and Range province and it may be used for the analysis of earthquake hazard.

引用

页码：1689 / 1692

页数：4

共 29 条

[1] RAPID ESTIMATION OF RUPTURE DIRECTIVITY - APPLICATION TO THE 1992 LANDERS (MS=7.4) AND CAPE MENDOCINO (MS=7.2), CALIFORNIA EARTHQUAKES [J].