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Science 10 August 1973:
Vol. 181. no. 4099, pp. 545 - 547
DOI: 10.1126/science.181.4099.545
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Articles

Aftershocks and Intensity of the Managua Earthquake of 23 December 1972

Tosimatu Matumoto 1 and Gary Latham 1

1 Marine Biomedical Institute, University of Texas Medical Branch, Galveston 77550

Two portable seismic stations and a fixed array of five seismometers were used to record aftershocks in the vicinity of Managua, Nicaragua, after the earthquake of 23 December 1972. Approximately 3000 aftershocks were recorded during a 20-day period in January 1973. Left lateral motion along at least two faults, both trending N40°E, is inferred from the seismic data. This is in good agreement with dislocations mapped at the surface in Managua. The data suggest that the shallow earthquakes of the Managua region are a consequence of north-south compressional stresses and east-west tensional stresses. This is consistent with regional plate movements deduced in other investigations.


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
Shallow-focus seismicity, composite focal mechanism, and tectonics of the Valle Central of Costa Rica.
W. MONTERO P. and J. W. DEWEY (1982)
Bulletin of the Seismological Society of America 72, 1611-1626
   Abstract »    PDF »
Crustal structure in Southern Central America.
T. MATUMOTO, M. OHTAKE, G. LATHAM, and J. UMANA (1977)
Bulletin of the Seismological Society of America 67, 121-133
   Abstract »    PDF »
Earthquake precursors.
T. RIKITAKE (1975)
Bulletin of the Seismological Society of America 65, 1133-1162
   Abstract »    PDF »
The Managua, Nicaragua, earthquake of December 23, 1972: Location, focal mechanism, and intensity distribution.
S. T. ALGERMISSEN, J. W. DEWEY, C. J. LANGER, and W. H. DILLINGER (1974)
Bulletin of the Seismological Society of America 64, 993-1004
   Abstract »    PDF »
Aftershocks of the Managua, Nicaragua, earthquake of December 23, 1972.
C. J. LANGER, M. G. HOPPER, S. T. ALGERMISSEN, and J. W. DEWEY (1974)
Bulletin of the Seismological Society of America 64, 1005-1016
   Abstract »    PDF »
Aftershocks of the Managua, Nicaragua, earthquake and the tectonic significance of the Tiscapa fault.
P. L. WARD, J. GIBBS, D. HARLOW, and A. ABURTO Q. (1974)
Bulletin of the Seismological Society of America 64, 1017-1029
   Abstract »    PDF »
Seismicity of the Middle America arc-trench system near Managua, Nicaragua.
J. W. DEWEY and S. T. ALGERMISSEN (1974)
Bulletin of the Seismological Society of America 64, 1033-1048
   Abstract »    PDF »


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