Research ArticleEARTHQUAKES

The evolving interaction of low-frequency earthquakes during transient slip

Science Advances  22 Apr 2016:
Vol. 2, no. 4, e1501616
DOI: 10.1126/sciadv.1501616

You are currently viewing the abstract.

View Full Text

Abstract

Observed along the roots of seismogenic faults where the locked interface transitions to a stably sliding one, low-frequency earthquakes (LFEs) primarily occur as event bursts during slow slip. Using an event catalog from Guerrero, Mexico, we employ a statistical analysis to consider the sequence of LFEs at a single asperity as a point process, and deduce the level of time clustering from the shape of its autocorrelation function. We show that while the plate interface remains locked, LFEs behave as a simple Poisson process, whereas they become strongly clustered in time during even the smallest slow slip, consistent with interaction between different LFE sources. Our results demonstrate that bursts of LFEs can result from the collective behavior of asperities whose interaction depends on the state of the fault interface.

Keywords
  • seismology
  • low-frequency earthquakes (LFEs)
  • slow earthquakes

This is an open-access article distributed under the terms of the Creative Commons Attribution license, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

View Full Text

More Like This