On the full-waveform inversion of seismic moment tensors
In this work, we propose a full-waveform technique for the spatial reconstruction and characterization of (micro-) seismic events via joint source location and moment tensor inversion. The approach is formulated in the frequency domain, and it allows for the simultaneous inversion of multiple point-...
Saved in:
Published in | International journal of solids and structures Vol. 202; pp. 717 - 728 |
---|---|
Main Authors | , , |
Format | Journal Article |
Language | English |
Published |
New York
Elsevier Ltd
01.10.2020
Elsevier BV |
Subjects | |
Online Access | Get full text |
Cover
Loading…
Summary: | In this work, we propose a full-waveform technique for the spatial reconstruction and characterization of (micro-) seismic events via joint source location and moment tensor inversion. The approach is formulated in the frequency domain, and it allows for the simultaneous inversion of multiple point-like events. In the core of the proposed methodology is a grid search for the source locations that encapsulates the optimality condition on the respective moment tensors. The developments cater for compactly supported elastic bodies in R2; however our framework is directly extendable to inverse (seismic) source problems in R3 involving both bounded and unbounded elastic domains. A set of numerical results, targeting laboratory applications, is included to illustrate the performance of the inverse solution in situations involving: (i) reconstruction of multiple events, (ii) sparse (pointwise) boundary measurements, (iii) “off-grid” location of the micro-seismic events, and (iv) inexact knowledge of the medium’s elastic properties. |
---|---|
ISSN: | 0020-7683 1879-2146 |
DOI: | 10.1016/j.ijsolstr.2020.06.012 |