A Detailed Earthquake Catalog for Banda Arc– Australian Plate Collision Zone Using Machine-Learning Phase Picker and an Automated Workflow

Chengxin Jiang*, Ping Zhang, Malcolm C.A. White, Robert Pickle, Meghan S. Miller

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

22 Citations (Scopus)

Abstract

The tectonic setting of Timor–Leste and Eastern Indonesia comprises of a complex transition from oceanic lithosphere subduction to arc-continental collision. To better under-stand the deformation and convergent-zone structure of the region, we derive a new catalog of earthquake hypocenters and magnitudes from a temporary deployment of five years of continuous seismic data using an automated processing procedure. This includes a machine-learning phase picker, EQTransformer, and a sequential earthquake association and location workflow. We detect and locate ∼19,000 events during 2014–2018, which demonstrates that it is possible to characterize earthquake sequences from raw seismic data using a well-trained machine-learning picker for a complex convergent plate setting. This study provides the most complete catalog available for the region for the duration of the temporary deployment, which includes a complex pattern of crustal events across the collision zone and into the back-arc, as well as abundant deep slab seismicity.

Original languageEnglish
Pages (from-to)1-10
Number of pages10
JournalSeismic Record
Volume2
Issue number1
DOIs
Publication statusPublished - Jan 2022

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