Combining stress transfer and source directivity: the case of the 2012 Emilia seismic sequence.

ABSTRACT: The Emilia seismic sequence (Northern Italy) started on May 2012 and caused 17 casualties, severe damage to dwellings and forced the closure of several factories. The total number of events recorded in one month was about 2100, with local magnitude ranging between 1.0 and 5.9. We investigate potential mechanisms (static and dynamic triggering) that may describe the evolution of the sequence. We consider rupture directivity in the dynamic strain field and observe that, for each main earthquake, its aftershocks and the subsequent large event occurred in an area characterized by higher dynamic strains and corresponding to the dominant rupture direction. We find that static stress redistribution alone is not capable of explaining the locations of subsequent events. We conclude that dynamic tri

SUBMITTER: Convertito V 

PROVIDER: S-EPMC3814900 | biostudies-literature | 2013 Nov

REPOSITORIES: biostudies-literature