Improvements to detection capability by cross-correlating for similar events: a case study of the 1999 Xiuyan, China, sequence and synthetic sensitivity tests

Details Improvements to detection capability by cross-correlating for similar events: a case study of the 1999 Xiuyan, China, sequence and synthetic sensitivity tests Improvements to detection capability by cross-correlating for similar events: a case study of the 1999 Xiuyan, China, sequence and synthetic sensitivity tests

Feb 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010geoji.180..829s&link_type=abstract

Geophysical Journal International, Volume 180, Issue 5, pp. 829-846.

Statistics

Computation

1

Seismic Monitoring And Test-Ban Treaty Verification, Computational Seismology, Asia

Scientific paper

Comparisons are made of the performance of a correlation detector compared to a standard short-term average window/long-term average window (STA/LTA) detector for 90 events in the 1999 Xiuyan, China, earthquake sequence. Triggers on three component data verify independent detections to the nearest sample. Unrelated signals that trigger above a threshold do not align on the three components and do not constructively interfere when the cross-correlation traces are stacked or averaged. Semi-similar events due to less than perfect matches arising from substantial mechanism differences can provide useful detections. Synthetic tests on 78028 focal mechanisms indicate that statistically significant detections are still triggered for strike, dip and rake variations as large as 55°. The correlation detector finds 90 out of 90 or 100 per cent of the events whereas a STA/LTA detector finds 10 out of 90 or 11 per cent. This represents a 1.3 magnitude unit reduction in detection threshold for these events or nearly a factor of 20 improvement.

Affiliated with

Also associated with

No associations

Rating

Improvements to detection capability by cross-correlating for similar events: a case study of the 1999 Xiuyan, China, sequence and synthetic sensitivity tests 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 Improvements to detection capability by cross-correlating for similar events: a case study of the 1999 Xiuyan, China, sequence and synthetic sensitivity tests, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Improvements to detection capability by cross-correlating for similar events: a case study of the 1999 Xiuyan, China, sequence and synthetic sensitivity tests will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1091350