ISTerre seminar

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Understanding Earthquake Physical Mechanisms through Seismicity and Waveform Analysis

Wednesday 15 April 2026 - 11h00

Weifan Lu - Postdoctoral Fellow, ISTerre
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Understanding the physical mechanisms that control earthquake generation and the properties governing fault behavior is a central problem in earthquake physics. The rapid growth of seismic observations in recent years has created an unprecedented opportunity to exploit large-scale datasets to investigate these processes. In this talk, I will introduce how seismicity responds to periodic (tidal) stress perturbations across a broad range of frequencies. The modulation of seismicity by tides provides a valuable probe for constraining the effective background normal stress on faults at depth. I will also present a systematic comparison of rupture initiation for earthquakes of different magnitudes in northern California between 2000 and 2024. This comparison aims to identify both common and magnitude-dependent features during the nucleation phase. Together, these complementary analyses link seismicity and waveform observations to the underlying physics of earthquake initiation and the physical parameters governing fault behavior.

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Organizing team : Ondes et structures

Salle Dolomieu, Maison des Géosciences, 38400 Saint Martin d'Hères

Informations de visio :

https://univ-grenoble-alpes-fr.zoom.us/j/98184455022?pwd=2Pm6aVLiAaOELdyWbKxsG1vAyTCxe3.1
Meeting ID: 981 8445 5022
Code: 118014