EES Departmental Seminar - Min Liu (Postdoctoral Fellow - Dalhousie University) - VIRTUAL Seminar via ZOOM Link
Ocean Frontier Institute
“High-Precision Earthquake Locations Reveal How Earthquakes Nucleate, Migrate and Their Associated Seismogenic Structures”
ABSTRACT: It is critical to understand how earthquakes nucleate, migrate, as well as their associated seismogenic structures, which are the cornerstones of earthquake prediction. Complete earthquake detections and high-precision earthquake locations play significant roles in achieving the goals. In recent years, machine-learning has shown promise in high-precision earthquake catalog building, especially for those low-magnitude events. In this talk, I will demonstrate how to use machine-learning-based earthquake locations along with other advanced seismic analysis methods to understand earthquake nucleation, migration, and their associated seismogenic structures. Results show 1) high-precision earthquake locations could delineate detailed seismogenic structures including those small branch faults and hidden faults; 2) aseismic slip and stress transfer triggering are not mutually exclusive in earthquake nucleation process, instead, they could feedback each other; 3) fluid could drive earthquake swarm migration under tidal modulation.
BIO: Min Liu is a recent Ocean Frontier Institute Postdoctoral Fellow in the Department of Earth and Environmental Sciences at Dalhousie University. Min was a visiting PhD student under the supervision of Dr. Miao Zhang at Dalhousie from June 2019 to August 2020 before he received his PhD from the China University of Geosciences (Beijing) in September 2021. His PhD work focuses on the understanding of how earthquakes nucleate, migrate and their associated seismogenic structures using state-of-the-art methods including machine-learning-based high-precision earthquake location. He has published 12 journal papers, including four first-authored publications in Geophysical Research Letters, Journal of Geophysical Research: Solid Earth, Seismological Research Letters, and Tectonophysics.
VIRTUAL Seminar via ZOOM Link
(Please contact the department at firstname.lastname@example.org for the Zoom link.)