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  4. Nonparametric Assessment of Aftershock C ...

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Nonparametric Assessment of Aftershock Clusters of the Maule Earthquake Mw = 8.8
Volume 11, Issue 4 (2013), pp. 623–638
Javier E. Contreras-Reyes  

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https://doi.org/10.6339/JDS.2013.11(4).1188
Pub. online: 4 August 2022      Type: Research Article      Open accessOpen Access

Published
4 August 2022

Abstract

Abstract: 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.

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Keywords
Aftershock distribution kernel density estimation nonparametric density-based clustering

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