Physics
Scientific paper
Sep 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001georl..28.3297l&link_type=abstract
Geophysical Research Letters, Volume 28, Issue 17, p. 3297-3300
Physics
2
Seismology, Seismology: Body Wave Propagation, Seismology: General Or Miscellaneous
Scientific paper
The generation processes of T-waves were investigated from seismograms produced by a local intermediate-depth earthquake and recorded at one short-period station in Taiwan. The first group of T-phases arrived 44 seconds after the S-phases, while the following 2 groups consistently had the same travel-time difference of about 88 seconds each. Analyses of the ray paths and travel-times of these phases show that the T-waves were converted from the S-waves and oscillated within the ocean above the forearc in the southeastern Taiwan area. Further comparisons of these results with those of previous studies suggest that the generation of T-waves is probably dependent on the incidence angles of the seismic waves. The T-waves were converted from S-waves when the incidence angles of the seismic waves were near vertical, whereas they were generated from P-waves when those angles were near horizontal.
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