Connecting a broad spectrum of transient slip on the San Andreas fault

This is a Preprint and has not been peer reviewed.


Download Preprint

Supplementary Files

Yen Joe Tan, David Marsan


Strain accumulated on the deep extension of some faults are episodically released during transient slow-slip events which can subsequently load the shallow seismogenic region. At the San Andreas fault, the characteristics of slow-slip events are difficult to constrain geodetically due to their small deformation signal. Slow-slip events are often accompanied by coincident tremor bursts composed of many low-frequency earthquakes. Here we probabilistically estimate the spatiotemporal clustering properties of low-frequency earthquakes detected along the central San Andreas fault. We find that tremor bursts follow a power-law spatial and temporal decay similar to earthquake aftershock sequences. The low-frequency earthquake clusters reveal that the underlying slow-slip events have two modes of rupture velocity. Compared to regular earthquakes, the slow-slip events have smaller stress drops and rupture velocities but follow similar magnitude-frequency, moment-area, and moment-duration scaling. Our results connect a broad spectrum of transient fault slips that spans several orders of magnitude in rupture velocity.



Earth Sciences, Geophysics and Seismology, Physical Sciences and Mathematics


low-frequency earthquakes, non-volcanic tremor, san andreas fault, slow-slip events


Published: 2020-02-12 21:27

Last Updated: 2020-09-04 05:03

Older Versions

CC BY Attribution 4.0 International

Add a Comment

You must log in to post a comment.


There are no comments or no comments have been made public for this article.