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Map showing epicenters of M≥5 earthquakes up to February 4, 2020, in the 2019–2020 Puerto Rico swarm sequence of earthquakes. The region has been seismically active since ancient times. The Great Northern and Great Southern fault zones that cross the main island of Puerto Rico laterally have been active since the Eocene epoch.
The Puerto Rico Trench is located on the boundary between the Caribbean Sea and the Atlantic Ocean, parallel to and north of Puerto Rico and the Virgin Islands. The oceanic trench, the deepest in the Atlantic, is associated with a complex transition between the Lesser Antilles subduction zone to the south and the major transform fault zone or ...
Bathymetry of the northeast corner of the Caribbean Plate showing the major faults and plate boundaries; view looking south-west. The main bathymetric features of this area include: the Lesser Antilles Volcanic Arc; the old inactive volcanic arc of the Greater Antilles (Virgin Islands, Puerto Rico, and Hispaniola); the Muertos Trough; and the Puerto Rico Trench formed at the plate boundary ...
Puerto Rico is composed of Jurassic to Eocene volcanic and plutonic rocks, which are overlain by younger Oligocene to recent carbonates and other sedimentary rocks. Most of the caverns and karst topography on the island occurs in the northern Oligocene to recent carbonates. The oldest rocks are approximately 190 million years old (Jurassic) and ...
2019–20 Puerto Rico earthquakes. Starting on December 28, 2019, [7] and progressing into 2020, the southwestern part of the island of Puerto Rico was struck by an earthquake swarm, [8] including 11 that were of magnitude 5 or greater. [9] The largest and most damaging of this sequence was a magnitude 6.4 Mw, which occurred on January 7 at 04: ...
The Cascadia subduction zone is a 960 km (600 mi) fault at a convergent plate boundary, about 100–200 km (70–100 mi) off the Pacific coast, that stretches from northern Vancouver Island in Canada to Northern California in the United States. It is capable of producing 9.0+ magnitude earthquakes and tsunamis that could reach 30 m (98 ft).
Location of the Mona Passage. The Mona Passage (Spanish: Canal de la Mona) is a strait that separates the islands of Hispaniola and Puerto Rico. The Mona Passage connects the Atlantic Ocean to the Caribbean Sea and is an important shipping route between the Atlantic and the Panama Canal. The Mona Passage is 80 miles (130 kilometers) long.
Plaque showing location of San Andreas Fault in San Mateo County. The San Andreas Fault is a continental right-lateral strike-slip transform fault that extends roughly 1,200 kilometers (750 mi) through the U.S. state of California. [1] It forms part of the tectonic boundary between the Pacific Plate and the North American Plate. Traditionally ...