Historical seismicity of the southeastern Caribbean and tectonic implications

We have relocated the twenty-eight largest magnitude (4.3 less than or equal to M sub(s) less than or equal to 7.3) historical (1922-1963) earthquakes of the southeastern Caribbean. The results of the relocations are commensurate with the distribution of seismicity observed in the recent era: hypoce...

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Bibliographic Details
Published in:Pure and applied geophysics 1992-01, Vol.139 (1), p.87-120
Main Authors: RUSSO, R. M, OKAL, E. A, ROWLEY, K. C
Format: Article
Language:English
Subjects:
Earth sciences
Earth, ocean, space
Earthquakes, seismology
Exact sciences and technology
Internal geophysics
Marine
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Summary:We have relocated the twenty-eight largest magnitude (4.3 less than or equal to M sub(s) less than or equal to 7.3) historical (1922-1963) earthquakes of the southeastern Caribbean. The results of the relocations are commensurate with the distribution of seismicity observed in the recent era: hypocenters are shallow and intermediate in depth (0-200 km), and the events occur almost exclusively in areas known to be currently seismic. The new focal mechanisms, despite being a sparse data set, give significant insight into both subduction processes along the Lesser Antilles arc and into the shallow deformation of the Caribbean-South America plate boundary zone.
ISSN:0033-4553
1420-9136
DOI:10.1007/BF00876827