1946 Dominican Republic earthquake

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1946 Dominican Republic earthquake
Gonâve microplate.png
The Septentrional-Oriente fault zone in the Caribbean and across Hispaniola
1946 Dominican Republic earthquake is located in the Dominican Republic
1946 Dominican Republic earthquake
UTC time1946-08-04 17:51:10
ISC event898498
Local dateAugust 4, 1946 (1946-08-04)
Local time13:51
Magnitude8.1 Ms[1]
Epicenter19°12′00″N 69°18′58″W / 19.2°N 69.316°W / 19.2; -69.316Coordinates: 19°12′00″N 69°18′58″W / 19.2°N 69.316°W / 19.2; -69.316
Areas affectedDominican Republic
Max. intensityIX (Violent) [2]
Peak acceleration0.4 g (est) [2]

The 1946 Dominican Republic earthquake occurred on August 4 at 17:51 UTC near Samaná, Dominican Republic. The mainshock measured 8.1 on the surface wave magnitude scale and an aftershock occurred four days later on August 8 at 13.28 UTC with a magnitude of 7.6. A tsunami was generated by the initial earthquake and caused widespread devastation across Hispaniola. The tsunami was observed in much of the Caribbean and the northwestern Atlantic Ocean.[3][4][5][6]

A small tsunami was also recorded by tide gauges at San Juan in Puerto Rico, Bermuda and in the United States at Daytona Beach, Florida and Atlantic City, New Jersey.[7]

See also[edit]


  1. ^ Dolan, James F. (1998). Paul Mann (ed.). Active Strike-Slip and Collisional Tectonics of the Northern Caribbean Plate Boundary Zone. Geological Society of America. p. 44. ISBN 978-0-8137-2326-6.
  2. ^ a b Lynch, Joseph J.; Bodle, Ralph R. (1948), "The Dominican earthquakes of August, 1946", Bulletin of the Seismological Society of America, 38 (1): 4, 5
  3. ^ "Northern Chile Rocked By Earthquake: West Indies Too". Morning Bulletin (Rockhampton, Qld. : 1878 - 1954). 6 August 1946. Retrieved 29 October 2019.
  4. ^ Historic Earthquakes: Samana, Dominican Republic 1946 Archived 2008-06-02 at the Wayback Machine, USGS, Retrieved June 10, 2008
  5. ^ Woods Hole Oceanographic Institution (February 8, 2005). "Major Caribbean Earthquakes And Tsunamis A Real Risk". Science Daily. Retrieved December 9, 2012. CS1 maint: discouraged parameter (link)
  6. ^ O'Loughlin, Karen Fay; Lander, James F. (2003), Caribbean tsunamis: a 500-year history from 1498–1998, Boston: Kluwer, p. 82, ISBN 978-1-4020-1717-9
  7. ^ Lander, James F.; Lockridge, Patricia A. (1989). United States Tsunamis, (including United States possessions) 1690–1988: Publication 41-2 (PDF). United States Department of Commerce. pp. 219, 220.

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