List of earthquakes in Puerto Rico and the Virgin Islands

Map showing the epicenters of all the magnitude 5 and greater earthquakes in the eastern region of the Caribbean for the last 100 years. Filled circle color indicates depth and circle size indicates magnitude. The five biggest, most destructive, earthquakes of the last 250 years with magnitudes of 7 and greater are shown by stars.

Puerto Rico and the Virgin Islands lie at the boundary between the Caribbean and North American plates, making these territories prone to earthquakes. This is a highly active seismic region both surrounded and traversed by numerous fault lines; to the north, the North American plate subducts into the Caribbean plate, while a number of fault lines cross the main island of Puerto Rico diagonally from southeast to northeast. Puerto Rico and the Virgin Islands are also located on a microplate that is continuously being trampled by the subduction zone to the north. Puerto Rico is constantly prone to experiencing major earthquakes, superior to 7.0, at any moment.

Map showing epicenters of M≥5 earthquakes up to February 4, 2020 in the 2019–2020 Puerto Rico swarm sequence of earthquakes.

Seismicity in Puerto Rico and the Virgin Islands is comparable to that of California and the Western United States; however seismicity in the region can be divided into two smaller areas: the more active western part of the island and the less active eastern part that is shared with the US Virgin Islands, where the subduction zone is located. The North American plate moves about 2 cm a year into the Caribbean plate. In addition to the subduction fault there are numerous transform faults that cross the island laterally. These transform or strike-slip faults produce the same kind of horizontal-motion earthquakes that the San Andreas fault is known to generate. Over millions of years the movement of these faults have influenced Puerto Rico's geography and formed valleys such as the Lajas and the Caguas valleys, the largest of their kind on the island. The fault zone located in the Lajas Valley is of great concern for geologists as it is poorly mapped and might extend for a longer area towards Ponce in the southern coast.

History

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. Earthquakes in the region have been recorded since the early 17th century and some of the first seismic activity in the Americas were recorded first in Puerto Rico and Hispaniola. One of the first recorded earthquakes in the region was in September 8, 1615, which originated in the Dominican Republic region and caused damages throughout the island. Earthquakes have been studied and recorded in Puerto Rico since the 20th century. The Puerto Rico Seismic Network (Red Sísmica de Puerto Rico or RSPR), which is contained within the department of Geology of the University of Puerto Rico, Mayagüez, was established in 1974 by the United States Geological Survey (USGS) and the former Puerto Rico Electric Power Authority (PREPA). It was established with the goal evaluating seismic features for the purpose of building nuclear power plants in the region. Its mission today is to detect, process and study seismic activity within the Puerto Rico region. The RSPR operates 25 seismometers throughout Puerto Rico, the US Virgin Islands and the British Virgin Islands. Two of these seismometers are owned by the United States Army Corps of Engineers.

On average, there are about 5 earthquakes recorded per day and about 3 earthquakes with magnitude 5.0 higher recorded per year in the region. Given that most of the active faults are located at sea, most earthquakes in the region do not cause loss of life or significant damage, and significant destructive earthquakes that occur in Puerto Rico are rare. Most large earthquakes have historically occurred at sea which makes the area susceptible to destructive tsunamis. The last tsunami to cause significant damages in Puerto Rico was in October 11, 1918 which was generated by the 1918 Aguadilla earthquake. There have been more recent tsunami events, such as in 1946, which did not cause significant damage to the island. The last earthquakes to cause loss of life were the 2020 southwestern Puerto Rico sequence of earthquakes which caused 4 deaths. The last earthquake to cause significant damage and loss of life in the Virgin Islands occurred in 1867; this earthquake generated a tsunami that affected the Virgin Islands and Puerto Rico.

Notable earthquakes

Date	Name	Area	Mag.	MMI	Deaths	Injuries	Total damage / notes
1615-09-08	Hispaniola	Dominican Republic	-	-	-	-	One of the oldest recorded earthquakes in the Puerto Rico and Caribbean region. It affected Hispaniola and caused damage in Puerto Rico.
1670-08-15	Puerto Rico	Puerto Rico	-	-	-	-	Unknown epicenter, it caused damages in San Juan and San Germán, at the time the largest settlements in Puerto Rico.
1707-01-01	Arecibo	Puerto Rico	-	-	-	-	Unknown epicenter, it destroyed the Arecibo Cathedral and several important colonial buildings in San Germán.
1717-08-30	Puerto Rico	Puerto Rico	-	VII	-	-	Unknown epicenter, it destroyed Ponce's cathedral. The fact that it did not cause significant damage in Yauco, San Germán and Lajas suggests it was a small event localized close to Ponce.
1787-05-02	Puerto Rico	Puerto Rico Trench	8.0–8.5	IX	-	-	Possibly the strongest earthquake to have hit Puerto Rico since European colonization. It was strongly felt throughout the island and major damage was reported everywhere except for in the south (although there were minor damage in colonial buildings in Ponce). It destroyed several government buildings, parts of El Morro and other fortifications and walls in San Juan, the cathedral and colonial buildings in Arecibo, and historical buildings in Bayamón, Mayagüez and Toa Baja. Contemporary research bestows the possibility that it was not a single 8.0 event but multiple earthquakes ranging from 6.4 to 7.3.
1824-04-20	Saint Thomas	Virgin Islands	-	-	-	-	It was strongly felt in Saint Thomas where it destroyed at least one building.
1844-04-16	Puerto Rico	Puerto Rico Trench	-	VIII	-	-	Major damage was recorded in Puerto Rico and Saint Thomas. It damaged most houses in San Juan.
1851-02-22	San Juan	Puerto Rico Trench	-	-	-	-	It caused damage in San Juan's city hall.
1855-12-14	Salinas	Puerto Rico	-	VI	-	-	Said to be the strongest earthquake to have hit Salinas since the town's founding where it caused minor localized damage. It was also felt in Aguas Buenas.
1860-10-23	Mayagüez	Puerto Rico	-	VII	-	-	Felt strongly in Mayagüez where it caused damage.
1865-05-12	Saint Thomas	Virgin Islands	-	-	-	-	Pair of strong earthquakes that hit the Virgin Islands and caused damages in Saint Thomas.
1865-08-30	Puerto Rico	Puerto Rico	-	VI	-	-	Its epicenter was most likely located deep on land in the Central Mountain Ranges region of Puerto Rico. It caused damages in Ponce and Manatí.
1867-11-18	Virgin Islands	Virgin Islands	7.3	IX	40+	-	It produced a tsunami that affected the Virgin Islands and Puerto Rico.
1868-03-17	Virgin Islands	Virgin Islands	6.5	-	-	-
1874-08-26	Puerto Rico	Puerto Rico Trench	-	VI	-	-	It destroyed several houses and buildings in San Juan.
1875-12-08	Arecibo	Puerto Rico Trench	-	VIII	-	-	It caused significant damage in Arecibo and was strongly felt in Ponce.
1890-08-15	Puerto Rico	Puerto Rico	-	-	-	-	It was felt throughout the island and caused damages in Arecibo and Ponce.
1906-09-27	Puerto Rico	Puerto Rico	-	VI	-	-	Felt strongly throughout Puerto Rico and as far as the Dominican Republic and Saint Thomas. Only damages in San Juan were reported, where it caused fissures on the cathedral walls.
1906-10-20	Puerto Rico	Puerto Rico	-	VI	-	-	Felt throughout the island. Possibly an aftershock to the September 27 event.
1908-08-04	Puerto Rico	Puerto Rico	-	VI	-	-	Pair of earthquakes felt throughout Puerto Rico. Damage was reported in Arecibo, Ponce, San Germán and Yauco.
1909-02-17	Virgin Islands	Virgin Islands	-	VI	-	-	Felt in Puerto Rico and the Virgin Islands. Minor damage reported in Culebra and Saint Thomas.
1918-10-11	Puerto Rico	Mona Passage	7.1	IX	118	-	$4–29 million USD in damages. Damage and injuries were reported throughout the island. Several aftershocks were registered after the main shock, particularly a 6.5 aftershock that occurred the following year.
1902-05-13	Virgin Islands	Virgin Islands	-	VI	-	-	Felt strongly in Saint Thomas.
1920-02-10	Aguadilla	Mona Passage	6.4	VI	-	-
1943-07-29	Puerto Rico	Mona Passage	7.7	VI	-	-	It was felt throughout Puerto Rico but no deaths or injuries were reported. Minor damage was reported throughout the island.
1946-08-04	Dominican Republic	Dominican Repiblic	8.1	IX	2,550	-	Large earthquake centered in the Samaná Peninsula of the Dominican Republic. All deaths occurred in the Dominican Republic. No deaths or injuries was reported in Puerto Rico. Localized damaged was however reported throughout the island. A small tsunami was recorded in Mayagüez, Aguadilla and as far away in San Juan and even Daytona Beach, FL and Atlantic City, NJ. This is the largest earthquake to have hit the Caribbean region in the 20th century. It was followed by numerous aftershocks, the largest being 7.4 registered 4 days after the main shock.
1954-04-01	Aguadilla	Mona Passage	5.7	-	-	-
1955-05-13	Cruz Bay	Virgin Islands	5.8	-	-	-
1959-07-21	Punta Cana	Mona Passage	5.6	-	-	-
1959-09-01	Vieques	Virgin Islands	5.5	-	-	-
1966-11-03	Punta Cana	Mona Passage	6.0	-	-	-
1970-07-08	Saint Croix	Virgin Islands	6.1	IV	-	-
1974-01-01	Charlotte Amalie	Virgin Islands	4.6	-	-	-
1974-06-21	Isabela	Puerto Rico Trench	4.9	-	-	-
1974-08-29	Esperanza	Vieques	4.6	-	-	-
1974-10-26	Vega Alta	Puerto Rico	4.7	-	-	-
1975-06-17	Brenas	Puerto Rico	5.0	-	-	-
1976-03-29	Charlotte Amalie	Virgin Islands	4.7	-	-	-
1976-06-13	Punta Cana	Mona Passage	5.4	-	-	-
1977-05-02	San Antonio	Mona Passage	5.2	-	-	-
1978-09-07	Charlotte Amalie	Virgin Islands	5.0	-	-	-
1979-01-22	Cruz Bay	Virgin Islands	5.1	-	-	-	Earthquake swarm.
1979-03-23	Dominican Republic	Mona Passage	6.1	VI	-	-	Felt throughout the Dominican Republic, Haiti and Puerto Rico, and even as far away as Colombia.
1981-08-24	Puerto Rico	Mona Passage	5.7	-	-	-	Felt throughout the island. Light damage in Guayanilla.
1982-06-11	Cruz Bay	Virgin Islands	5.2	-	-	-	Earthquake swarm.
1983-12-19	San Antonio	Mona Passage	5.0	-	-	-
1984-01-23	San Juan	Puerto Rico Trench	4.9	-	-	-
1984-03-19	Charlotte Amalie	Virgin Islands	5.0	-	-	-	Earthquake swarm.
1984-10-02	Tallaboa	Puerto Rico	4.8	-	-	-
1985-06-26	Cruz Bay	Virgin Islands	5.9	-	-	-
1985-07-21	Punta Cana	Mona Passage	5.7	-	-	-
1986-02-13	Culebra	Virgin Islands	4.4	-	-	-
1986-02-18	Playita Cortada	Puerto Rico	4.7	IV	-	-
1986-06-05	Yauco	Puerto Rico	4.1	-	-	-
1987-05-30	Pole Ojea	Puerto Rico	4.6	V	-	-	Its epicenter was centered close to Boquerón. Minor damage reported in the southwestern region of the island.
1988-11-03	San Antonio	Puerto Rico Trench	6.0	IV	-	-
1990-01-09	Cruz Bay	Virgin Islands	5.0	-	-	-	Earthquake swarm.
1990-02-04	Loíza	Puerto Rico Trench	4.6	-	-	-
1990-06-21	Luquillo	Puerto Rico Trench	4.6	-	-	-
1990-10-01	Juncos	Puerto Rico	4.7	-	-	-
1992-02-10	San Juan	Puerto Rico Trench	4.5	-	-	-
1992-11-23	San Antonio	Mona Passage	5.3	-	-	-
1992-12-28	Cruz Bay	Virgin Islands	5.4	-	-	-
1993-01-13	Cruz Bay	Virgin Islands	5.0	-	-	-	Earthquake swarm.
1993-08-01	Emajagua	Muertos Trough	5.3	-	-	-
1996-05-11	Charlotte Amalie	Virgin Islands	5.1	-	-	-
1996-11-06	Cruz Bay	Virgin Islands	5.1	-	-	-
1999-01-18	San Antonio	Puerto Rico Trench	5.0	-	-	-
2001-10-17	Charlotte Amalie	Virgin Islands	6.0	IV	-	-	Earthquake swarm.
2001-10-17	Rincón	Mona Passage	4.6	III	-	-
2002-03-11	Cruz Bay	Virgin Islands	5.1	-	-	-
2002-06-12	Charlotte Amalie	Virgin Islands	4.5	III	-	-
2002-11-13	Cruz Bay	Virgin Islands	5.2	-	-	-	Earthquake swarm.
2003-03-21	Boca de Yuma	Mona Passage	5.1	-	-	-
2003-12-06	San Antonio	Puerto Rico Trench	5.1	-	-	-	Earthquake swarm.
2004-09-06	Vieques	Virgin Islands	5.1	-	-	-
2004-12-11	Cruz Bay	Virgin Islands	5.2	V	-	-
2006-08-14	Cruz Bay	Virgin Islands	5.3	V	-	-
2006-05-24	Las Piedras	Puerto Rico	4.0	III	-	-
2007-12-18	Cruz Bay	Virgin Islands	5.3	-	-	-	Earthquake swarm.
2008-02-04	Puerto Rico	Puerto Rico Trench	5.5	-	-	-
2008-10-11	Charlotte Amalie	Virgin Islands	6.1	V	-	-	Felt in Puerto Rico, the US and British Virgin Islands.
2009-03-12	Brenas	Puerto Rico Trench	5.1	V	-	-
2009-05-20	Vieques	Virgin Islands	5.0	IV	-	-
2009-06-13	Arecibo	Puerto Rico Trench	4.9	IV	-	-
2009-07-21	Charlotte Amalie	Virgin Islands	4.7	IV	-	-
2009-08-14	Suárez	Puerto Rico Trench	5.1	III	-	-
2010-04-10	Virgin Islands	Virgin Islands	4.8	IV	-	-
2010-05-16	Moca	Puerto Rico	5.8	VI	-	-	Felt throughout Puerto Rico, the Dominican Republic, and the US and British Islands. It caused minor damage in the western and northwestern regions of Puerto Rico, and a minor landslide that affected a portion of PR-111. It is the largest Puerto Rican earthquake to have occurred in land in recent times.
2010-07-07	Charlotte Amalie	Virgin Islands	4.5	III	-	-	Earthquake swarm.
2010-12-24	Aguas Buenas	Puerto Rico	5.1	V	-	-	Felt throughout Puerto Rico and the US Virgin Islands. It is colloquially known as the 2010 Noche Buena earthquake (2010 Christmas Eve earthquake). It caused minor damage throughout the island and localized power outages throughout the Caguas and San Juan regions. It is the largest earthquake to directly hit the San Juan Metropolitan region in recent times.
2011-01-21	San Juan	Puerto Rico Trench	4.9	IV	-	-
2011-04-13	Cruz Bay	Virgin Islands	5.0	IV	-	-
2011-11-28	Hatillo	Puerto Rico Trench	5.1	V	-	-	Pair of earthquakes (5.0 and 5.1).
2011-12-17	Stella	Puerto Rico	5.2	VI	-	-	Pair of earthquakes (5.2 and 5.1).
2013-02-26	Mona Passage	Mona Passage	5.1	V	-	-
2014-01-13	Hatillo	Puerto Rico Trench	6.4	V	-	-	Felt throughout Puerto Rico, particularly in San Juan and its suburbs.
2014-08-13	Culebra	Virgin Islands	4.6	V	-	-
2015-07-17	Aguadilla	Mona Passage	4.5	II	-	-
2015-08-05	Brenas	Puerto Rico Trench	4.6	II	-	-
2016-12-05	Emajagua	Puerto Rico	4.6	V	-	-
2017-07-17	Hatillo	Puerto Rico Trench	4.7	IV	-	-
2017-08-18	Brenas	Puerto Rico Trench	4.8	IV	-	-
2017-10-01	Rincón	Mona Passage	4.4	II	-	-
2018-02-09	Charlotte Amalie	Virgin Islands	4.5	II	-	-
2018-03-06	Culebra	Virgin Islands	4.5	III	-	-
2018-04-06	Cruz Bay	Virgin Islands	4.7	IV	-	-	Earthquake swarm.
2018-12-25	Mona Passage	Mona Passage	4.6	II	-	-
2019-02-18	Charlotte Amalie	Virgin Islands	4.8	IV	-	-
2019-03-12	Jobos	Puerto Rico	4.6	V	-	-	Felt throughout Puerto Rico. Localized minor damage in Guayama. It was followed by several aftershocks including a 4.1 which was the largest.
2019-09-24	San Antonio	Mona Passage	6.0	V	-	-	Felt throughout Puerto Rico and the Dominican Republic. It produced several aftershocks of which the September 26 one was the largest (5.1) and also resulted in minor localized damage.
2019-10-06	Cruz Bay	Virgin Islands	5.0	III	-	-	Earthquake swarm.
2019-12-28	Maria Antonia	Puerto Rico	4.7	V	-	-	First notable temblor in the earthquake swarm sequence of shocks that affected the southwestern portion of Puerto Rico from December 2019 throughout 2020.
2020-01-07	Puerto Rico	Puerto Rico	6.4	VIII	4	9	Strongest in the earthquake swarm sequence of shocks that affected the southwestern portion of Puerto Rico from December 2019 throughout 2020. It caused significant damages and power outages throughout the island.
2020-06-23	Isabela	Puerto Rico Trench	4.6	V	-	-
2021-02-05	Charlotte Amalie	Virgin Islands	5.0	IV	-	-

See also

• Geology of Puerto Rico
• List of earthquakes
• United States Geological Survey (USGS)