A Silent Slip Event on the Deeper Cascadia Subduction Interface
Top Cited Papers
- 25 May 2001
- journal article
- other
- Published by American Association for the Advancement of Science (AAAS) in Science
- Vol. 292 (5521) , 1525-1528
- https://doi.org/10.1126/science.1060152
Abstract
Continuous Global Positioning System sites in southwestern British Columbia, Canada, and northwestern Washington state, USA, have been moving landward as a result of the locked state of the Cascadia subduction fault offshore. In the summer of 1999, a cluster of seven sites briefly reversed their direction of motion. No seismicity was associated with this event. The sudden displacements are best explained by ∼2 centimeters of aseismic slip over a 50-kilometer-by-300-kilometer area on the subduction interface downdip from the seismogenic zone, a rupture equivalent to an earthquake of moment magnitude 6.7. This provides evidence that slip of the hotter, plastic part of the subduction interface, and hence stress loading of the megathrust earthquake zone, can occur in discrete pulses.Keywords
This publication has 23 references indexed in Scilit:
- GPS‐determination of along‐strike variation in Cascadia margin kinematics: Implications for relative plate motion, subduction zone coupling, and permanent deformationTectonics, 2001
- Time‐dependent inversion study of the slow thrust event in the Nankai trough subduction zone, southwestern JapanJournal of Geophysical Research, 2001
- A slow thrust slip event following the two 1996 Hyuganada Earthquakes beneath the Bungo Channel, southwest JapanGeophysical Research Letters, 1999
- Tectonic deformation in western Washington from continuous GPS measurementsGeophysical Research Letters, 1999
- Three‐dimensional dislocation model for great earthquakes of the Cascadia Subduction ZoneJournal of Geophysical Research, 1997
- Simplified analysis of horizontal stresses in a buttressed forearc sliver at an oblique subduction zoneGeophysical Research Letters, 1996
- Improved stability of a deeply anchored geodetic monument for deformation monitoringGeophysical Research Letters, 1995
- Thermal regime of the Southwest Japan subduction zone: effects of age history of the subducting plateTectonophysics, 1995
- Case for very low coupling stress on the Cascadia Ssubduction FaultJournal of Geophysical Research: Solid Earth, 1995
- Continuous GPS monitoring of elastic strain in the Northern Cascadia Subduction ZoneGeophysical Research Letters, 1995