Characterizing an ``uncharacteristic'' ETS event in northern Cascadia

Details Characterizing an ``uncharacteristic'' ETS event in northern Cascadia Characterizing an ``uncharacteristic'' ETS event in northern Cascadia

Aug 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008georl..3515303w&link_type=abstract

Geophysical Research Letters, Volume 35, Issue 15, CiteID L15303

Physics

8

Tectonophysics: Subduction Zone Processes (1031, 3060, 3613, 8413), Geodesy And Gravity: Transient Deformation (6924, 7230, 7240), Tectonophysics: Dynamics And Mechanics Of Faulting (8004), Seismology: Subduction Zones (1207, 1219, 1240)

Scientific paper

GPS and borehole strainmeter data allowed the detection and model characterization of a slow slip event in northern Cascadia in November 2006 accompanying a brief episode of seismic tremor. The event is much smaller in area and duration than other well-known ETS events in northern Cascadia but is strikingly similar to typical ETS events at the Nankai subduction zone. The 30-45 km depth range and the 2-3 cm slip magnitude as interpreted for this event appear to be common to most ETS events in these two subduction zones, regardless of their sizes. We infer that the Nankai-type small ETS events must be abundant at Cascadia and that ETS events at the two subduction zones are governed by a similar physical process.

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