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Crustal structure and surface-wave dispersion in Africa

Press, Frank and Ewing, Maurice and Oliver, Jack (1956) Crustal structure and surface-wave dispersion in Africa. Bulletin of the Seismological Society of America, 46 (2). pp. 97-103. ISSN 0037-1106. https://resolver.caltech.edu/CaltechAUTHORS:20140924-151925728

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Abstract

In 1953, through cooperation of the Bernard Price Geophysical Institute of the University of the Witwatersrand and the University of Natal, a Columbia University-type long-period seismometer (To = 15 sec., Tg = 75 sec.) was installed in the seismological observatory of the University of Natal at Pietermaritzburg, Union of South Africa. This instrument was well situated for receiving surface waves from the shock in northern Algeria of September 9, 1954, and the aftershock next day, which was of such intensity that its seismogram supplemented that of the original shock for the larger phases. The dispersion of the Rayleigh waves from these seismograms can be measured with greater precision than has been practicable heretofore for continents, because the path is longer (7,890 km.) than any which has been available for a long-period vertical instrument, and is remarkably free from obvious anomalies such as major mountain ranges. The scarcity of suitable seismograms for the study of Raleigh-wave dispersion along continental paths is due to the fact that suitably placed long-period vertical seismographs have not been available until recently.


Item Type:Article
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http://bssa.geoscienceworld.org/content/46/2/97.full.pdf+htmlPublisherArticle
Additional Information:© 1956 by the Seismological Society of America. Manuscript received for publication March 25, 1955. It is a pleasure to acknowledge the cooperation of Dr. P. G. Gane of the Bernard Price Geophysical Institute in Johannesburg and Professor A. N. Fairbrother and Mr. W. L. Mouton at the University of Natal in Pietermaritzburg.
Issue or Number:2
Record Number:CaltechAUTHORS:20140924-151925728
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20140924-151925728
Official Citation: Frank Press, Maurice Ewing, and Jack Oliver Crustal structure and surface-wave dispersion in Africa Bulletin of the Seismological Society of America, April 1956, v. 46, p. 97-103
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:50010
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:24 Sep 2014 22:39
Last Modified:03 Oct 2019 07:19

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