HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) References Citation Map Services Email this article to a friend Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by BYERLY, P. Search for Related Content GeoRef GeoRef Citation

The first preliminary waves of the Nevada earthquake of December 20, 1932^*

Abstract

The P travel-time curve of the Nevada earthquake is presented. It is drawn as a series of straight lines. It is near = 28° that the data outline most clearly the sudden change in slope of the curve, but definite evidence of overlapping of the branches is lacking. At = 67° (approximately) the curve branches into two parts as did the curve of the Texas earthquake. Between 4° and 12° three parallel P curves are drawn. The suggested explanation of them is that they are due to transformations of an original P or S at boundaries near the focus. This would indicate a depth of focus of about fifteen kilometers.

The nature of the first motion at the various stations shows a complex distribution which does not lead to a simple explanation of the forces acting at the focus.

A long-period component of P waves is observed, and it is concluded that it is present from very near the beginning of the record, although often masked by shorter-period motion. It begins in opposite phase to the shorter-period motion accompanying it.

Footnotes

^* [Received for publication June 4, 1934.]

This article has been cited by other articles:

				K. L. KAILA, P. R. REDDY, and H. NARAIN P-wave travel times from shallow earthquakes recorded in India and inferred upper mantle structure Bulletin of the Seismological Society of America, December 1, 1968; 58(6): 1879 - 1897. [Abstract] [PDF]

				M. BATH Initial motion of the first longitudinal earthquake wave recorded at Pasadena and Huancayo Bulletin of the Seismological Society of America, April 1, 1952; 42(2): 175 - 195. [Abstract] [PDF]

				P. BYERLY Near earthquakes in Central California Bulletin of the Seismological Society of America, July 1, 1939; 29(3): 427 - 462. [Abstract] [PDF]

				P. BYERLY The earthquake of July 6, 1934: Amplitudes and First Motion. Bulletin of the Seismological Society of America, January 1, 1938; 28(1): 1 - 13. [Abstract] [PDF]

				P. BYERLY and J. T. WILSON The Central California earthquakes of May 16, 1933, and June 7, 1934 Bulletin of the Seismological Society of America, July 1, 1935; 25(3): 223 - 246. [Abstract] [PDF]