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Slab morphology in the Cascadia fore arc and its relation to episodic tremor and slip
 

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Slab morphology in the Cascadia fore arc and its
relation to episodic tremor and slip
Pascal Audet,1,2
Michael G. Bostock,1
Devin C. Boyarko,3
Michael R. Brudzinski,3
and Richard M. Allen4
Received 31 August 2008; revised 26 August 2009; accepted 16 November 2009; published 2 April 2010.
[1] Episodic tremor and slip (ETS) events in subduction zones occur in the general
vicinity of the plate boundary, downdip of the locked zone. In developing an
understanding of the ETS phenomenon it is important to relate the spatial occurrence of
nonvolcanic tremor to the principal structural elements within the subduction complex. In
Cascadia, active and passive source seismic data image a highly reflective, dipping,
lowvelocity zone (LVZ) beneath the forearc crust; however, its continuity along the
margin is not established with certainty, and its interpretation is debated. In this work we

  

Source: Allen, Richard M. - Seismological Laboratory, Department of Earth and Planetary Science, University of California at Berkeley

 

Collections: Geosciences