Seismic rate variations prior to the 2010 Maule, Chile M_W 8.8 giant megathrust earthquake.

ABSTRACT: The M_W 8.8 Maule earthquake is the largest well-recorded megathrust earthquake reported in South America. It is known to have had very few foreshocks due to its locking degree, and a strong aftershock activity. We analyze seismic activity in the area of the 27 February 2010, M_W 8.8 Maule earthquake at different time scales from 2000 to 2019. We differentiate the seismicity located inside the coseismic rupture zone of the main shock from that located in the areas surrounding the rupture zone. Using an original spatial and temporal method of seismic comparison, we find that after a period of seismic activity, the rupture zone at the plate interface experienced a long-term seismic quiescence before the main shock. Furthermore, a few days before the main shock, a set of s

SUBMITTER: Derode B 

PROVIDER: S-EPMC7851146 | biostudies-literature | 2021 Feb

REPOSITORIES: biostudies-literature