Episodic Tremor and Slip on the Cascadia Subduction Zone: The Chatter of Silent Slip
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Abstract
We found that repeated slow slip events observed on the deeper interface of the northern Cascadia subduction zone, which were at first thought to be silent, have unique nonearthquake seismic signatures. Tremorlike seismic signals were found to correlate temporally and spatially with slip events identified from crustal motion data spanning the past 6 years. During the period between slips, tremor activity is minor or nonexistent. We call this associated tremor and slip phenomenon episodic tremor and slip (ETS) and propose that ETS activity can be used as a real-time indicator of stress loading of the Cascadia megathrust earthquake zone.
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The record
- Venue
- Science
- Topic
- earthquake and tectonic studies
- Field
- Earth and Planetary Sciences
- Canadian institutions
- Geological Survey of Canada
- Funders
- —
- Keywords
- Episodic tremor and slipSubductionGeologySeismologySlip (aerodynamics)Tectonics
- Has abstract in OpenAlex
- yes