Document Type

Article

Publication Date

1-7-2009

Publication Title

Geophysical Research Letters

Abstract

Elastic dislocation models of geodetic measurements

above subduction zones have led to the identification of

MW 6.0– 7.2 slow slip events (SSEs) that release elastic

strain over periods of days to months, but great (MW 8)

SSEs have remained unidentified. We extrapolate

observations of SSE duration and slip magnitude to show

that slip velocity decreases with event magnitude and

predict that the slip velocity of MW 8 SSEs is 50 mm/yr.

The slip velocity for great SSEs may never exceed the

plate convergence rate and thus never produce a reversal

in trench perpendicular motion. Instead, geodetically

constrained estimates of apparent partial elastic coupling

on subduction zone interfaces worldwide may be direct

observations of ongoing MW 8 silent earthquakes with

durations of decades to centuries.

Volume

36

Issue

L01306

DOI

10.1029/2008GL036364

Rights

  • “An edited version of this paper was published by AGU. Copyright (2009) American Geophysical Union.” http://onlinelibrary.wiley.com/doi/10.1029/2008GL036364/full

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