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Bulletin of the Seismological Society of America; October 1950; v. 40; no. 4; p. 281-289
© 1950 Seismological Society of America
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Velocities of P at short distances*

C. F. RICHTER

CALIFORNIA INSTITUTE OF TECHNOLOGY DIVISION OF GEOLOGICAL SCIENCES

Abstract

RECORDING of P and S at six or more stations to epicentral distances not over 160 km. makes it possible to calculate the velocities, assuming only that they are constant. Origin times, epicenters, and depths are found independently of velocity.

Installation of new temporary stations has supplied appropriate data in southern California. For 6 of 8 well-recorded shocks the calculated velocity of P is near 6.4 km/sec.

Footnotes

* Manuscript received for publication November 21, 1949.




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