Physics
Scientific paper
Jun 1974
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1974pepi....8..317s&link_type=abstract
Physics of the Earth and Planetary Interiors, Volume 8, Issue 4, p. 317-331.
Physics
1
Scientific paper
The caustic of SKP is found at an epicentral distance ΔC = 129.5° for surface foci and at ΔC = 128.9° for foci at 400 km depth, by means of amplitude-distance graphs based upon short-period time-domain measurements. These results are essentially confirmed by long-period time-domain measurements of SKP as well as by frequency-domain studies, even though the spectra are less accurate for such determinations. The average period of SKP is T = 1.45 +/- 0.45 sec from short-period records, significantly different from the corresponding PKP-period of 1.00 +/- 0.31 sec. Likewise, the long-period averages of SKP = 10.8 +/- 4.5 sec and of PKP = 7.7 +/- 3.0 sec are significantly different from each other. A travel-time table of SKP1 is deduced, covering the epicentral distance range of 130-143° and the focal depth range of 100-700 km. All results are based on measurements on seismograms of the Swedish network of stations, deriving almost exclusively from earthquakes in the southwest Pacific area.
Båth Markus
Stamou Petros
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