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A Silent Slip Event on the Deeper Cascadia Subduction Interface
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.
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Cited by
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Hyndman, R. D., & Peacock, S. M. (2003) · Earth and Planetary Science Letters · doi:10.1016/s0012-821x(03)00263-2 · Cited by 907
Ben‐Zion, Y. (2008) · Reviews of Geophysics · doi:10.1029/2008rg000260 · Cited by 493
Perfettini, H., & Avouac, J. ‐. (2004) · Journal of Geophysical Research: Solid Earth · doi:10.1029/2003jb002488 · Cited by 488
Implications for prediction and hazard assessment from the 2004 Parkfield earthquake
Bakun, W. H., Aagaard, B., Dost, B., Ellsworth, W. L., Hardebeck, J. L., Harris, R. A., Ji, C., Johnston, M. J. S., Langbein, J., Lienkaemper, J. J., et al. (2005) · Nature · doi:10.1038/nature04067 · Cited by 397
The tectonic regime along the Andes: Present‐day and Mesozoic regimes
Ramos, V. A. (2010) · Geological Journal · doi:10.1002/gj.1193 · Cited by 269
Metadata
- Authors
- Dragert, H., Wang, K., & James, T. S.
- Venue
- Science
- Published
- 2001-05-25
- Volume
- 292
- Issue
- 5521
- Pages
- 1525-1528
- ISSN
- 0036-8075 (ISSN-L)
- 1095-9203
- OpenAlex
- W2017662684
- Cited by
- 976
- References
- 0
- FWCI
- 27.72
- Type
- journal article
- Language
- en
- Open access
- closed
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