1984 San Pedro Basin earthquake

The 1984 San Pedro Basin earthquake occurred on June 24 at 07:17:14 local time with a moment magnitude of 6.7 and a maximum Mercalli intensity of VII (Very strong). The event occurred off the southern coast of the Dominican Republic and resulted in an estimated five fatalities.

1984 San Pedro Basin earthquake
Santo Domingo
La Romana
UTC time1984-06-24 11:17:14
ISC event551495
USGS-ANSSComCat
Local date24 June 1984 (1984-06-24)
Local time07:17:14
Magnitude6.7 Mw [1]
Depth35 km [1]
Epicenter17.97°N 69.3°W / 17.97; -69.3 [1]
TypeThrust
Areas affectedDominican Republic
Total damageLimited [2]
Max. intensityVII (Very strong) [3]
Casualties5 deaths

Tectonic setting

The northern boundary of the Caribbean Plate is a diffuse zone of varied fault types. The Muertos Trough marks the southern portion of this zone of deformation with north dipping convergence.[4]

Earthquake

This thrust earthquake occurred on a shallow and north-dipping fault and, at the time, it was the largest instrumentally recorded event in the Los Muertos Trough.[5]

Intensity

The United States Geological Survey estimated that more than 227,000 people were exposed to intensity VII (Very strong) shaking and more than 2.8 million experienced intensity VI (Strong) shaking.[3]

Aftershock

Five hours after the mainshock, a destructive 5.2 Mw  aftershock occurred about 5–10 miles to the northeast. Five deaths are also attributed to this event.[6]

See also

References
  1. ISC (2015), ISC-GEM Global Instrumental Earthquake Catalogue (1900–2009), Version 2.0, International Seismological Centre
  2. National Geophysical Data Center / World Data Service (NGDC/WDS) (1972), Significant Earthquake Database (Data Set), National Geophysical Data Center, NOAA, doi:10.7289/V5TD9V7K
  3. USGS (December 1, 2008), EXPO-CAT Earthquake Catalog, Version 2007-12, United States Geological Survey
  4. Yeats, R. (2012), Active Faults of the World, Cambridge University Press, p. 147, ISBN 978-0521190855
  5. Dolan, J. F.; Mullins, H. T.; Wald, D. J. (1998), "Active tectonics of the north-central Caribbean: Oblique collision, strain partitioning, and opposing subducted slabs", Active Strike-slip and Collisional Tectonics of the Northern Caribbean Plate Boundary Zone, Special Paper 326, Geological Society of America, p. 42, ISBN 978-0813723266
  6. USGS (September 4, 2009), PAGER-CAT Earthquake Catalog, Version 2008_06.1, United States Geological Survey


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