Weak mag. 3.9 earthquake - Caribbean Sea, 47 km west of Aguadilla, Puerto Rico, on Thursday, 21 Jan 2021 2:04 pm (GMT -4) -
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Weak magnitude 3.9 earthquake at 104 km depth
21 Jan 18:24 UTC: First to report: USGS after 21 minutes.
Date & time: 21 Jan 2021 18:04:06 UTC -
Local time at epicenter: Thursday, 21 Jan 2021 2:04 pm (GMT -4)
Magnitude: 3.9
Depth: 104.0 km
Epicenter latitude / longitude: 18.4976°N / 67.5925°W

Nearby towns and cities:
40 km (25 mi) WNW of Rincon (Rincón) (pop: 1,500) --> See nearby quakes!
47 km (29 mi) W of Aguadilla (pop: 16,100) --> See nearby quakes!
86 km (54 mi) E of Punta Cana (Dominican Republic) (pop: 100,000) --> See nearby quakes!
93 km (57 mi) W of Arecibo (pop: 49,300) --> See nearby quakes!
94 km (58 mi) WNW of Yauco (pop: 20,300) --> See nearby quakes!
111 km (69 mi) W of Barceloneta (Florida Afuera) (pop: 22,300) --> See nearby quakes!
116 km (72 mi) WNW of Ponce (pop: 152,600) --> See nearby quakes!
127 km (79 mi) W of Vega Baja (pop: 29,300) --> See nearby quakes!
146 km (90 mi) WNW of Aibonito (pop: 8,950) --> See nearby quakes!
157 km (97 mi) W of Puerto Rico (pop: 418,100) --> See nearby quakes!
118 km (74 mi) WNW of Puerto Rico Island (pop: 3,474,200) --> See nearby quakes!
Weather at epicenter at time of quake:
Clear Sky
27.6°C (82 F), humidity: 68%, wind: 0 m/s (1 kts) from NNE
Primary data source: USGS (United States Geological Survey)Clear Sky

Estimated released energy: 4.5 x 1010 joules (12.4 megawatt hours, equivalent to 10.7 tons of TNT) 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.
Magnitude | Depth | Location | Source |
M 3.9 | 104 km | 40 Km WNW of Rincón, Puerto Rico | USGS |
M 3.9 | 103 km | MONA PASSAGE, PUERTO RICO | EMSC |
User reports for this quake
User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
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There are no user reports for this quake yet. If you felt it Earlier earthquakes in the same area since 1900
- Date / time UTC| Mag |Depth|Age|Distance| Details
- 29 Jul 1943 03:02| 7.7 |15km / 9.3mi|78 years ago|66km / 41mi| North Atlantic Ocean, 46 km N of Isabela, Puerto Rico
- 04 Aug 1946 17:51| 7.5 |15km / 9.3mi|75 years ago|186km / 116mi| North Atlantic Ocean, 15 km E of Sabana de la Mar, Dominican Republic
- 11 Oct 1918 14:14| 7.1 |15km / 9.3mi|102 years ago|52km / 32mi| North Atlantic Ocean, 42 km N of Aguadilla, Puerto Rico
- 08 Aug 1946 13:28| 7.0 |15km / 9.3mi|75 years ago|246km / 153mi| North Atlantic Ocean, 26 km NE of Nagua, Dominican Republic
- 13 Jan 2014 04:01| 6.4 |28km / 17mi|7 years ago|96km / 60mi| North Atlantic Ocean, 60 km N of Arecibo, Puerto Rico
- 10 Feb 1920 22:07| 6.4 |15km / 9.3mi|101 years ago|30km / 19mi| North Atlantic Ocean, 29 km NW of Aguadilla, Puerto Rico
- 07 Jan 2020 08:24| 6.3 |10km / 6.2mi|1 year 7 weeks ago|114km / 71mi| Caribbean Sea, 30 km SW of Ponce, Segundo Barrio, Ponce, Puerto Rico
- 24 Sep 2019 03:23| 6.0 |10km / 6.2mi|1 year 22 weeks ago|73km / 45mi| North Atlantic Ocean, 98 km N of Mayagüez, Puerto Rico
- 03 Nov 1988 19:42| 6.0 |33km / 21mi|32 years ago|74km / 46mi| North Atlantic Ocean, 99 km N of Mayagüez, Puerto Rico
- 03 Nov 1966 16:24| 6.0 |27km / 16mi|54 years ago|74km / 46mi| North Atlantic Ocean, 80 km NE of Пунта Кана, Dominican Republic
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