P and S beyond 95° |
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| Authors: | Harold Jeffreys |
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| Institution: | 160 Huntingdon Road, Cambridge CE3 0LE |
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| Abstract: | Summary. Data for P and S beyond 85° are used for earthquakes in the four epicentral regions that travel times have been found for (Japan, Europe, Central and South Pacific). They seem to disagree seriously with suggestions of a considerable change in the times and dt/dΔ for S from the Jeffreys—Bullen tables of 1939–40. There are signs of a sharp drop in dt/dΔ for both Pand S in the range 93–95° except for the Southern Pacific. |
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