Major magnitude 7.7 earthquake - North Atlantic Ocean, 46 km north of Isabela, Puerto Rico, on Thursday, July 29, 1943 at 03:02 (GMT)
Major magnitude 7.7 earthquake at 15 km depth
Depth: 15.0 km
Epicenter latitude / longitude: 18.905°N / 67.131°W↗ (North Atlantic Ocean, Puerto Rico)
Antipode: 18.905°S / 112.869°E↗
Nearby towns and cities:
99 km (61 mi) NW of Puerto Rico Island (pop: 3,474,200) --> See nearby quakes!
Primary data source: USGS (United States Geological Survey)
Estimated released energy: 2.2 x 1016 joules (6219 gigawatt hours, equivalent to 5.4 x 106 tons of TNT or 334.4 atomic bombs!) More info
Data for the same earthquake reported by different agencies
Info: The more agencies report about the same quake and post similar data, the more confidence you can have in the data. It takes normally up to a few hours until earthquake parameters are calculated with near-optimum precision.
|7.7||15 km||Puerto Rico region||USGS|
User reports for this quake
User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
Recorded aftershocks, latest first (0 quakes)
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