Automated moment tensor inversion to estimate source mechanisms of hydraulically induced micro-seismicity in salt rock

被引：79

作者：

Dahm, T

Manthei, G

Eisenblätter, J

机构：

[1] Univ Frankfurt, Inst Meteorol & Geophys, D-60323 Frankfurt, Germany

[2] GMuG, D-6123 Ober Morlen, Germany

来源：

TECTONOPHYSICS | 1999年 / 306卷 / 01期

关键词：

hydraulic fracturing; micro-earthquakes; acoustic emissions; seismic moment tensor;

D O I：

10.1016/S0040-1951(99)00041-4

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

Two methods for an automated moment tensor inversion are investigated. The first is a single-source inversion using amplitude spectra of observed body-wave phases and theoretical Green functions, and the second a relative moment tensor inversion using spectral moments of body-wave phases. An optional general-dislocation-source constraint is introduced to stabilize the inversions for sparse data. Both methods are successfully tested on synthetic data and are applied to hydraulically induced micro-seismicity in salt rock. The estimated moment tensors of 187 events show similar radiation patterns with a major double-couple component and a small or zero isotropic component. We explain the double-couple component with failure on horizontal, preexisting planes of weakness within the process zone of circular tension-fractures (C) 1999 Elsevier Science B.V. All rights reserved.

引用

页码：1 / 17

页数：17