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Analytical prediction of seismicity rate due to tides and other oscillating stresses

Heimisson, Elías R. and Avouac, Jean‐Philippe (2020) Analytical prediction of seismicity rate due to tides and other oscillating stresses. Geophysical Research Letters, 47 (23). Art. No. e2020GL090827. ISSN 0094-8276. doi:10.1029/2020gl090827.

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Oscillatory stresses are ubiquitous on Earth and other solid‐surface bodies. Tides and seasonal signals perpetually stress faults in the crust. Relating seismicity to these stresses offers fundamental insight into earthquake triggering. We present a simple model that describes seismicity rate due to perpetual oscillatory stresses. The model applies to large‐amplitude, nonharmonic, and quasiperiodic stressing. However, it is not valid for periods similar to the characteristic time ta. We show that seismicity rate from short‐period stressing scales with the stress amplitude, but for long periods with the stressing rate. Further, that background seismicity rate r is equal to the average seismicity rate during short‐period stressing. We suggest that Aσ₀ may be underestimated if stresses are approximated by a single harmonic function. We revisit Manga et al. (2019,, which analyzed the tidal triggering of marsquakes and provide a rescaling of their seismicity rate response that offers a self‐consistent comparison of different hydraulic conditions.

Item Type:Article
Related URLs:
URLURL TypeDescription
Heimisson, Elías R.0000-0001-8342-7226
Avouac, Jean‐Philippe0000-0002-3060-8442
Additional Information:© 2020 American Geophysical Union. Issue Online: 24 November 2020; Version of Record online: 24 November 2020; Accepted manuscript online: 20 November 2020; Manuscript accepted: 12 November 2020; Manuscript revised: 11 November 2020; Manuscript received: 16 September 2020. This research was partly supported by NSF award EAR‐1821853. We thank three anonymous reviewers for their constructive remarks that significantly improved this manuscript. Data Availability Statement: This is a theoretical paper and contains no data.
Group:Center for Geomechanics and Mitigation of Geohazards (GMG), Division of Geological and Planetary Sciences, Seismological Laboratory
Funding AgencyGrant Number
Subject Keywords:tides; Marsquakes; earthquake triggering; rate‐and‐state friction; seasonal seismicity
Issue or Number:23
Record Number:CaltechAUTHORS:20201123-125242998
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Official Citation:Heimisson, E. R., & Avouac, J.‐P. (2020). Analytical prediction of seismicity rate due to tides and other oscillating stresses. Geophysical Research Letters, 47, e2020GL090827.
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:106786
Deposited By: Tony Diaz
Deposited On:23 Nov 2020 23:44
Last Modified:15 Nov 2022 19:15

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