Artificial seismic acceleration

Nature Geoscience
By: , and 

Links

Abstract

In their 2013 paper, Bouchon, Durand, Marsan, Karabulut, 3 and Schmittbuhl (BDMKS) claim to see significant accelerating seismicity before M 6.5 interplate mainshocks, but not before intraplate mainshocks, reflecting a preparatory process before large events. We concur with the finding of BDMKS that their interplate dataset has significantly more fore- shocks than their intraplate dataset; however, we disagree that the foreshocks are predictive of large events in particular. Acceleration in stacked foreshock sequences has been seen before and has been explained by the cascade model, in which earthquakes occasionally trigger aftershocks larger than themselves4. In this model, the time lags between the smaller mainshocks and larger aftershocks follow the inverse power law common to all aftershock sequences, creating an apparent acceleration when stacked (see Supplementary Information).

Additional publication details

Publication type Article
Publication Subtype Journal Article
Title Artificial seismic acceleration
Series title Nature Geoscience
DOI 10.1038/ngeo2358
Volume 8
Year Published 2015
Language English
Publisher Nature Publishing Group
Contributing office(s) Earthquake Science Center
Description 2 p.
First page 82
Last page 83