Moment tensor solutions: a useful tool for seismotectonics

0496558 - GFÚ 2019 RIV CH eng M - Monography Chapter
Šílený, Jan
Constrained moment tensors: source models and case studies.
Moment tensor solutions: a useful tool for seismotectonics. Cham: Springer, 2018 - (D'Amico, S.), s. 213-231. Springer natural hazards. ISBN 978-3-319-77358-2
R&D Projects: GA ČR(CZ) GA16-03950S
Institutional support: RVO:67985530
Keywords : earthquake source parameters * wave-form data * source mechanism * seismic events * global seismicity
OECD category: Volcanology

The moment tensor (MT) has become a standard for describing seismic sources, both in earthquake seismology and for various types of induced seismicity. In its full generality, it however is not always useful because of troubles with its reliable reconstruction from poor monitoring geometries, noisy data, inexact velocity/attenuating model etc. In practice, it is advantageous to constrain it with the aim to stabilize the inverse task. Commonly applied deviatoric constraint is however not optimum, especially in induced seismicity where volume changes in the focus are expected. The shear-tensile crack – a combination of a shear slip and opening/closing of the fault is a preferable source model, as it allows a volume change, and yields robust solutions of the inverse task.

Permanent Link: http://hdl.handle.net/11104/0289300