Present-Day Crustal Stress Field from Gcmt Focal Mechanisms Based on the Slip Model.

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Olaiz Campos, J. A. and Muñoz Martín, Alfonso and De Vicente Muñoz, Gerardo (2022) Present-Day Crustal Stress Field from Gcmt Focal Mechanisms Based on the Slip Model. In 83rd EAGE Annual Conference & Exhibition,, jun 2022.

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Official URL: https://doi.org/10.3997/2214-4609.202210577



Abstract

The Slip Model is applied to the Global Centroid Moment Tensor database to determine the present day state of stress. Thus, from each focal mechanism the horizontal shortening direction (Dey) and the shape factor of the strain ellipsoid (k`), defined as the relationship between the maximum horizontal shortening and the vertical axis, are calculated. Additionally, this method proposed the neoformed plane from the calculated nodal planes. In this study, to determine the stress configuration at crustal scale, only depths < 40 km are included. Focal mechanisms are grouped in reverse, strike-slip and normal, to analyse its distribution and to determine the b-parameter from Gutenberg-Richter law. Finally, global shape factor and horizontal shortening direction maps are presented.


Item Type:Conference or Workshop Item (Other)
Subjects:Sciences > Physics > Geophysics
Sciences > Geology
Sciences > Geology > Geodynamics
ID Code:73402
Deposited On:04 Jul 2022 07:46
Last Modified:05 Jul 2022 08:04

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