Moment tensors and source processes of three deep Sea of Okhotsk earthquakes

Details Moment tensors and source processes of three deep Sea of Okhotsk earthquakes Moment tensors and source processes of three deep Sea of Okhotsk earthquakes

Aug 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987pepi...47..107s&link_type=abstract

Physics of the Earth and Planetary Interiors, Volume 47, p. 107-124.

Physics

9

Scientific paper

Three large deep earthquakes beneath the Sea of Okhotsk are studied using the relative amplitudes of the direct P phase and the surface reflections pP and sP observed on teleseismic long-period WWSSN seismograms. Use of this comprehensive dataset provides a redundancy of information which allows possible deviation of the source mechanism from the double couple model to be studied over a large part of the focal sphere, in a region where previous workers have postulated complex source mechanisms including implosive precursors and multiple events. Focal mechanism solutions derived from the relative amplitudes are used to create synthetic seismograms which further assist the modelling of the source processes of these earthquakes. One of the three earthquakes occurred close to a sequence of complex earthquakes in 1970-1971 and comprises a number of discrete but related subevents, the two main subevents with similar source mechanism orientations, and the latter subevent probably triggered by the first. The other two earthquakes, which occurred further southwest, are similar to each other and their seismograms display features characteristic of the finite size and rupture propagation of the source which enable the source size, geometry and rupture velocity to be estimated. The source moment tensors of all three earthquakes show no significant deviation from a simple double couple and show no evidence of a volumetric component.

Affiliated with

Also associated with

No associations

Rating

Moment tensors and source processes of three deep Sea of Okhotsk earthquakes does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Moment tensors and source processes of three deep Sea of Okhotsk earthquakes, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Moment tensors and source processes of three deep Sea of Okhotsk earthquakes will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1342203