Nonparametric Assessment of Aftershock Clusters of the Maule Earthquake Mw = 8:8

We study the spatial distribution of clusters associated to the aftershocks of the megathrust Maule earthquake MW 8.8 of 27 February 2010. We used a recent clustering method which hinges on a nonparametric estimation of the underlying probability density function to detect subsets of points forming clusters associated with high density areas. In addition, we estimate the probability density function using a nonparametric kernel method for each of these clusters. This allows us to identify a set of regions where there is an association between frequency of events and coseismic slip. Our results suggest that high coseismic slip is spatially related to high aftershock frequency.

並列關鍵字

Aftershock distribution ； kernel density estimation ； Maule 2010 earthquake ； nonparametric density-based clustering ； slip model

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