Articles | Volume 12, issue 11
https://doi.org/10.5194/se-12-2523-2021
https://doi.org/10.5194/se-12-2523-2021
Research article
 | 
09 Nov 2021
Research article |  | 09 Nov 2021

Very early identification of a bimodal frictional behavior during the post-seismic phase of the 2015 Mw 8.3 Illapel, Chile, earthquake

Cedric Twardzik, Mathilde Vergnolle, Anthony Sladen, and Louisa L. H. Tsang

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Latest update: 14 Jul 2024
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Short summary
After an earthquake, the fault continues to slip for days to months. Yet, little is know about the very early part of this phase (i.e., minutes to hours). We have looked at what happens just after an earthquake in Chile from 2015. We find that the fault responds in two ways: south of the rupture zone it slips seismically in the form of aftershocks, while north of the rupture zone it slips slowly. Early inference of such bimodal behavior could prove to be useful for forecasting aftershocks.