First breaks-automatic phase pickings of P- and S-onsets in seismic records

Details First breaks-automatic phase pickings of P- and S-onsets in seismic records First breaks-automatic phase pickings of P- and S-onsets in seismic records

Nov 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999georl..26.3249f&link_type=abstract

Geophysical Research Letters, Volume 26, Issue 21, p. 3249-3252

Physics

Geophysics

3

Exploration Geophysics: Data Processing, Exploration Geophysics: Seismic Methods, Seismology, Seismology: Nuclear Explosion Seismology

Scientific paper

We have developed, validated and extensively tested a fast and versatile processing scheme for picking with confidence P- and S- arrival times in local seismic records. Out of 300 local events analyzed accurate P- and S- arrival times were automatically picked for 90% of these recordings. Essential ingredients in the processing scheme were i) prewhitening, ii) wavelet transform, iii) polarization filtering, iv) envelope transform and v) finally function fitting by a simulated annealing method for picking first breaks in approximately noise free envelope records.

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