Moderate mag. 4.1 earthquake - Caribbean Sea, 37 km southwest of Ponce, Segundo Barrio, Ponce, Puerto Rico, on Saturday, Aug 14, 2021 11:39 pm (GMT -4) -

Moderate mag. 4.1 earthquake - Caribbean Sea, 37 km southwest of Ponce, Segundo Barrio, Ponce, Puerto Rico, on Saturday, Aug 14, 2021 11:39 pm (GMT -4)

Moderate magnitude 4.1 earthquake at 10 km depth

15 Aug 03:51 UTC: First to report: EMSC after 12 minutes.
Date & time: Aug 15, 2021 03:39:49 UTC -
Local time at epicenter: Saturday, Aug 14, 2021 11:39 pm (GMT -4)
Magnitude: 4.1
Depth: 10.0 km
Epicenter latitude / longitude: 17.77°N / 66.86°W (Caribbean Sea, Puerto Rico)
Antipode: 17.77°S / 113.14°E
Nearby towns and cities:
23 km (14 mi) SSE of Guanica (pop: 9,220) --> See nearby quakes!
29 km (18 mi) SSW of Guayanilla (pop: 5,210) --> See nearby quakes!
29 km (18 mi) S of Yauco (pop: 20,300) --> See nearby quakes!
30 km (19 mi) SE of La Parguera (pop: 1,140) --> See nearby quakes!
37 km (23 mi) SW of Ponce (pop: 152,600) --> See nearby quakes!
41 km (26 mi) ESE of Pole Ojea (pop: 1,830) --> See nearby quakes!
46 km (28 mi) WSW of Potala Pastillo (pop: 3,820) --> See nearby quakes!
48 km (30 mi) SE of Puerto Real (Miradero) (pop: 6,170) --> See nearby quakes!
75 km (47 mi) SW of Aibonito (pop: 8,950) --> See nearby quakes!
111 km (69 mi) SW of San Juan (pop: 418,100) --> See nearby quakes!
65 km (41 mi) SW of Puerto Rico Island (pop: 3,474,200) --> See nearby quakes!
156 km (97 mi) WSW of Vieques Island (pop: 9,300) --> See nearby quakes!
177 km (110 mi) WSW of Isla de Culebra Island (pop: 1,820) --> See nearby quakes!
Weather at epicenter at time of quake:
Broken Clouds 26.5°C (80 F), humidity: 81%, wind: 7 m/s (14 kts) from E
Primary data source: EMSC (European-Mediterranean Seismological Centre)
Estimated released energy: 8.9 x 1010 joules (24.8 megawatt hours, equivalent to 21.3 tons of TNT) More info
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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.
4.17 km13 Km S of Guánica, Puerto RicoUSGS

User reports for this quake (4)

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
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Puerto Rico, San Juan Antiguo Barrio, San Juan (113.3 km NE of epicenter) [Map] / not felt (reported through our app)
Loiza, Puerto Rico (127.1 km NE of epicenter) [Map] / not felt (reported through our app)
Guanica (19.7 km N of epicenter) [Map] / Light shaking (MMI IV) / rattling, vibrating / 2-5 s : Shaking.  
Mayagüez, Puerto Rico / Very weak shaking (MMI II) / rattling, vibrating / very short : Rolling chair rocked a little, vibrated and got loose causing it to roll since floor is uneven. On 3rd floor.  
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