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Moderate mag. 4.0 earthquake - Caribbean Sea, 8.1 km southeast of Guanica, Puerto Rico, on Thursday, Dec 24, 2020 at 7:17 am (GMT -4)

Moderate mag. 4.0 earthquake - Caribbean Sea, 8.1 km southeast of Guanica, Puerto Rico, on Thursday, Dec 24, 2020 at 7:17 am (GMT -4) Moderate mag. 4.0 earthquake - Caribbean Sea, 8.1 km southeast of Guanica, Puerto Rico, on Thursday, Dec 24, 2020 at 7:17 am (GMT -4)

Moderate magnitude 4.0 earthquake at 12 km depth

24 Dec 11:25 UTC: First to report: USGS after 9 minutes.
24 Dec 12:58: Hypocenter depth recalculated from 10.0 to 12.0 km (from 6.2 to 7.5 mi). Epicenter location corrected by 12 km (7.5 mi) towards N.

Earthquake details

Date & timeDec 24, 2020 11:17:00 UTC
Local time at epicenterThursday, Dec 24, 2020 at 7:17 am (GMT -4)
StatusConfirmed
Magnitude4
Depth12.0 km
Epicenter latitude / longitude17.9335°N / 66.8425°W (Caribbean Sea, Puerto Rico)
Antipode17.934°S / 113.158°E
Shaking intensityWeak shaking
Felt6 reports
Primary data sourceUSGS (United States Geological Survey)
Nearby towns and cities7 km (4 mi) SE of Maria Antonia (pop: 1,480) | Show on map | Quakes nearby
8 km (5 mi) ESE of Guanica (pop: 9,220) | Show on map | Quakes nearby
11 km (7 mi) SSW of Guayanilla (pop: 5,210) | Show on map | Quakes nearby
11 km (7 mi) S of Yauco (pop: 20,300) | Show on map | Quakes nearby
19 km (12 mi) SW of Penuelas (Peñuelas) (pop: 6,850) | Show on map | Quakes nearby
20 km (13 mi) SE of Sabana Grande (pop: 8,960) | Show on map | Quakes nearby
25 km (15 mi) WSW of Ponce (pop: 152,600) | Show on map | Quakes nearby
26 km (16 mi) ESE of Lajas (pop: 5,260) | Show on map | Quakes nearby
27 km (17 mi) SE of San German (San Germán) (pop: 12,100) | Show on map | Quakes nearby
28 km (18 mi) SSW of Adjuntas (pop: 5,080) | Show on map | Quakes nearby
98 km (61 mi) SW of San Juan (pop: 418,100) | Show on map | Quakes nearby
50 km (31 mi) SW of Puerto Rico Island (pop: 3,474,200) | Show on map | Quakes nearby
151 km (94 mi) W of Isla de Vieques Island (pop: 9,300) | Show on map | Quakes nearby
170 km (106 mi) WSW of Isla de Culebra Island (pop: 1,820) | Show on map | Quakes nearby
Weather at epicenter at time of quakeFew Clouds 23°C (73 F), humidity: 65%, wind: 1 m/s (3 kts) from SW
Estimated seismic energy released6.3 x 1010 joules (17.5 megawatt hours, equivalent to 15.1 tons of TNT) | about seismic energy
Show interactive Map
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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.
Mag.DepthLocationSource
4.012 km7 Km SE of Maria Antonia, Puerto RicoUSGS
4.010 kmPUERTO RICO REGIONEMSC

Seismograms

Seismic station: San Juan, Puerto Rico (SJG/IU network) | Distance from quake: 76 km / 47 mi | Show on map | Station Info
Seismic station San Juan, Puerto Rico: vertical movement plot around time of quake (source: IRIS/BUD)
Seismogram (vertical component) around time of quake. Thin dotted red line indicates time of quake. Seismic waves arrive some time later, depending on distance. Source: IRIS Buffer of Uniform Data (BUD) webtool
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User reports for this quake (6)

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
Translate
Comunas, Playa Barrio, Yabucoa (111.4 km E of epicenter) [Map] / Very weak shaking (MMI II) / rattling, vibrating / very short (reported through our app)
Ciales, Ciales Barrio-Pueblo (56.2 km NE of epicenter) [Map] / Light shaking (MMI IV) (reported through our app)
Manati (66.1 km NE of epicenter) [Map] / Very weak shaking (MMI II) / rattling, vibrating / 1-2 s
Plan Bonito, Cabo Rojo / Weak shaking (MMI III)
Hatillo / Weak shaking (MMI III)
Peñuelas, Barreal, Sector El Llano (20.3 km NNE of epicenter) [Map] / Weak shaking (MMI III) / 1-2 s

Earlier earthquakes in the same area

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