1946 Dominican Republic earthquake

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1946 Dominican Republic earthquake
1946 Dominican Republic earthquake is located in the Dominican Republic
1946 Dominican Republic earthquake
Date August 4, 1946 (1946-08-04)
Magnitude 8.1 Ms[1]
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Areas affected Dominican Republic
Haiti
Max. intensity IX [2]
Peak acceleration .4g (est) [2]
Tsunami Yes
Casualties ~ 100 [3]

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 southern Atlantic ocean.

Damage

The earthquake killed around 100, but left some 20,000 people homeless. The death toll was unusually low as it coincided with a holiday in the afternoon, when most people were outdoors. It caused severe damage in the northern Dominican Republic from Samana to Santiago and Puerto Plata. Slumping and sand blows were observed in the Yaque del Norte and Yuna River Valleys. The earthquake was felt strongly in parts of Haiti and Puerto Rico, and to a lesser extent in the Virgin Islands and eastern Cuba.[3]

Tsunami

The Septentrional-Oriente fault zone in the Caribbean and across Hispaniola

The earthquake also caused a tsunami which struck at Matanza, near Nagua (Julia Molina) where a 2.5-metre (8 ft 2 in) - 4–5-metre (13–16 ft) high wave drowned a number of people and affected an area of land several kilometres inland. Tsunami associated with the quake killed 1600–1800 people, for a total of about 2550 fatalities.[4][5]

A small tsunami was also recorded by tide gauges at San Juan, Puerto Rico, Bermuda and in the United States at Daytona Beach, Florida and Atlantic City, New Jersey.[6]

See also

References

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  2. 2.0 2.1 Lua error in package.lua at line 80: module 'strict' not found.
  3. 3.0 3.1 Historic Earthquakes: Samana, Dominican Republic 1946, USGS, Retrieved June 10, 2008
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Sources
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