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TICOSECT Experiment 2
TICOSECT Experiment 2 Description The primary goal of Experiment 2 is to test the hypothesis that subducted seamounts are sites of earthquake nucleation by obtaining three-dimensional seismic coverage of the forearc in the vicinity of the Cobano 1990 M=7.0 earthquake. Ocean bottom and land seismic refraction data were collected to determine the seismic velocity structure and plate boundary morphology in the seismogenic zone. Two-dimensional marine seismic reflection data were also collected to image the shallow section of the forearc, which is currently undergoing faulting and deformation in response to the earthquakes nucleated below. Subducted seamounts are inferred to have created the north-northeast trending furrows located just to the south of the seismic survey grid.
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