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Abstract
Deep earthquakes' mechanisms remain unclear. This study uses unsupervised machine learning on the Japan Meteorological Agency catalog to estimate b-values of deep earthquakes in the northwestern Pacific. A kink at magnitude 3.7-3.8, with b-values changing from 1.4-1.7 to 0.6-0.7, reveals enhanced transformational faulting in a ~1 km thick, highly hydrated rim of the metastable olivine wedge.
Publisher
Communications Earth & Environment
Published On
Mar 10, 2022
Authors
Gilbert L. Mao, Thomas P. Ferrand, Jiaqi Li, Brian Zhu, Ziyi Xi, Min Chen
Tags
deep earthquakes
unsupervised machine learning
b-values
transformational faulting
metastable olivine wedge
Pacific region
Japan Meteorological Agency

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