Seismological evidence for the brittle-ductile interaction hypothesis on earthquake loading

Details Seismological evidence for the brittle-ductile interaction hypothesis on earthquake loading Seismological evidence for the brittle-ductile interaction hypothesis on earthquake loading

Aug 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004ep%26s...56..823j&link_type=abstract

Earth, Planets and Space, Volume 56, p. 823-830.

Physics

3

Scientific paper

We extended the analyses of temporal variation of coda Q-1 and seismicity by Jin and Aki (1989, 1993) for central and southern California to year 2003. We use the relative frequency N(Mc) of earthquakes in a certain magnitude range around Mc characteristic to a seismic region to quantify the seismicity. The cross-correlation function between coda Q-1 and N(Mc) is calculated using a 10-year moving time window . The correlation coefficient for the entire period of about 60 years is peaked at the zero-time shift with the value close to 0.8 for both regions. We found, however, the simultaneous correlation is disturbed before major earthquakes. The disturbance is, consistently, a delay in the change of coda Q-1 relative to that of N(Mc) before the occurrence of a major earthquake. We attribute the temporal change in coda Q-1 to fractures in the ductile part of the lithosphere and that in N(Mc) to the response of the brittle part to the ductile fracture. We believe that Mc characteristic to a seismic region is originated from a characteristic size of fractures in the ductile zone of the lithosphere. The observed delay of coda Q-1 change relative to N(Mc) before a major earthquake can be explained simply by the strain energy stored in the brittle part of lithosphere reaching a saturation limit and starting to flow back to the ductile part.

Affiliated with

Also associated with

No associations

Rating

Seismological evidence for the brittle-ductile interaction hypothesis on earthquake loading 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 Seismological evidence for the brittle-ductile interaction hypothesis on earthquake loading, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Seismological evidence for the brittle-ductile interaction hypothesis on earthquake loading will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1172100