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Figure F8. Seismicity along the northern Cascadia region in the vicinity of Site 889 (red circle). Earthquakes in oceanic and continental crust are shown as black and blue symbols in A, and tremor events at and above the subduction thrust boundary are shown as red symbols in B. Stars = large continental crustal events. No events have been detected with the land-based seismic network on the subduction thrust seaward of the band of tremor events (i.e., where the thrust is believed to be locked during the current phase of a several-hundred-year-long interseismic interval) (from Kao et al., 2006). ETS = episodic tremor and slip.

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