Abstract:We determine the rupture velocity, rupture area, stress drop and duration of four strong deepfocus earthquakes in the Philippines by backprojecting the teleseismic P waves. Four deep-focus earthquakes occurred in a totally consumed Molucca microplate; their focal depths were greater than 550 km and their moment magnitudes were between M w 6.6 and M w 7.6. By studying this deep-focus cluster, we are able to estimate the rupture velocity, rupture area and stress drop which would assist in constraining the physic… Show more
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