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A permanent seismograph array around the Gulf of California

INSTITUTE OF GEOPHYSICS AND PLANETARY PHYSICS SCRIPPS INSTITUTION OF OCEANOGRAPHY UNIVERSITY OF CALIFORNIA, SAN DIEGO, LA JOLLA, CALIFORNIA 92093
COMISION FEDERAL DE ELECTRICIDAD DEPARTMENT OF GEOLOGY, MEXICO 20, D.F., MEXICO
INSTITUTO DE GEOFISICA UNIVERSIDAD NACIONAL AUTONOMA DE MEXICO, MEXICO 20, D.F., MEXICO
CENTRO DE INVESTIGACIONES CIENTIFICAS Y EDUCACION SUPERIOR DE ENSENADA, AVENIDA GASTELUM 898, ENSENADA, B.C., MEXICO
SEISMOLOGICAL LABORATORY CALIFORNIA INSTITUTE OF TECHNOLOGY, PASADENA, CALIFORNIA 91125

Abstract

A permanent seismographic array has been established around the Gulf of California. Solar-powered stations are operating at Caborca, Bahia de los Angeles, Guaymas, Topolobampo and La Paz. Trailer stations using local 60-cycle power are operating at San Felipe, Rio Hardy, Rancho Meling, and Ensenada. The array is unique in the following aspects: (1) It is the only array operating in close proximity to an active region of sea-floor spreading; (2) its sophisticated low-power design and use of solar energy made siting choices simpler so that local noise sources could be minimized; (3) it is the first accurately timed array to operate in northwest Mexico.

The array has already provided important information on seismicity in the Gulf of California and has aided in several sonobuoy studies of swarms and aftershock sequences. As more data accumulate, many of the important questions concerning the seismicity, tectonics, and structure of the Gulf of California will be answered.

This article has been cited by other articles:

				A. REYES, J. N. BRUNE, and C. LOMNITZ Source mechanism and aftershock study of the Colima, Mexico earthquake of January 30, 1973 Bulletin of the Seismological Society of America, December 1, 1979; 69(6): 1819 - 1840. [Abstract] [PDF]