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Moderate mag. 4.7 earthquake - Caribbean Sea, Peñuelas, 7.9 km east of Guanica, Puerto Rico, on Thursday, Dec 24, 2020 at 1:33 pm (GMT -4)

Moderate mag. 4.7 earthquake - Caribbean Sea, Peñuelas, 7.9 km east of Guanica, Puerto Rico, on Thursday, Dec 24, 2020 at 1:33 pm (GMT -4) Moderate mag. 4.7 earthquake - Caribbean Sea, Peñuelas, 7.9 km east of Guanica, Puerto Rico, on Thursday, Dec 24, 2020 at 1:33 pm (GMT -4)

Moderate magnitude 4.7 earthquake at 9 km depth

24 Dec 17:37 UTC: First to report: USGS after 4 minutes.
24 Dec 17:48: Hypocenter depth recalculated from 5.0 to 9.8 km (from 3.1 to 6.1 mi). Epicenter location corrected by 8.6 km (5.3 mi) towards NE.
24 Dec 17:52: Magnitude recalculated from 4.8 to 4.7. Hypocenter depth recalculated from 9.8 to 9.0 km (from 6.1 to 5.6 mi). Epicenter location corrected by 10.1 km (6.3 mi) towards WSW.
Update Thu, 24 Dec 2020, 17:42

Magnitude 4.8 earthquake strikes near Yauco, Puerto Rico

4.8 quake 24 Dec 1:33 pm (GMT -4)
4.8 quake 24 Dec 1:33 pm (GMT -4)
An earthquake of magnitude 4.8 occurred only 8 minutes ago 12 km southeast of Yauco, Puerto Rico, the United States Geological Survey (USGS) reported.
The quake hit at a very shallow depth of 5 km beneath the epicenter near Yauco, Yauco Barrio-Pueblo, Puerto Rico, around noon on Thursday 24 December 2020 at 1:33 pm local time. The exact magnitude, epicenter, and depth of the quake might be revised within the next few hours or minutes as seismologists review data and refine their calculations, or as other agencies issue their report.
Based on the preliminary seismic data, the quake should have been widely felt by almost everyone in the area of the epicenter. It might have caused light to moderate damage.
Moderate shaking probably occurred in Indios (pop. 1,700) located 7 km from the epicenter.
In Maria Antonia (pop. 1,500) located 10 km from the epicenter, Guayanilla (pop. 5,200) 10 km away, Guanica (pop. 9,200) 11 km away, Palomas (pop. 2,300) 11 km away, Yauco (pop. 20,300) 12 km away, Peñuelas (pop. 6,800) 17 km away, and Ponce (pop. 152,600) 22 km away, the quake should have been felt as light shaking.
Weak shaking might have been felt in Bayamon (pop. 203,500) located 87 km from the epicenter, and San Juan (pop. 418,100) 96 km away.
VolcanoDiscovery will automatically update magnitude and depth if these change and follow up if other significant news about the quake become available. If you're in the area, please send us your experience through our reporting mechanism, either online or via our mobile app. This will help us provide more first-hand updates to anyone around the globe who wants to know more about this quake.

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Earthquake details

Date & timeDec 24, 2020 17:33:47 UTC
Local time at epicenterThursday, Dec 24, 2020 at 1:33 pm (GMT -4)
StatusConfirmed
Magnitude4.7
Depth9.0 km
Epicenter latitude / longitude17.9461°N / 66.8385°W (Caribbean Sea, Peñuelas, Puerto Rico)
Antipode17.946°S / 113.162°E
Shaking intensityLight shaking
Felt20 reports
Primary data sourceUSGS (United States Geological Survey)
Nearby towns and cities6 km (4 mi) SSW of Indios (Guayanilla) (pop: 1,740) | Show on map | Quakes nearby
8 km (5 mi) ESE of Guanica (Guánica) (pop: 9,220) | Show on map | Quakes nearby
10 km (6 mi) SSW of Guayanilla (pop: 5,210) | Show on map | Quakes nearby
10 km (6 mi) S of Yauco (pop: 20,300) | Show on map | Quakes nearby
17 km (11 mi) SW of Penuelas (Peñuelas) (pop: 6,850) | Show on map | Quakes nearby
20 km (12 mi) SE of Sabana Grande (pop: 8,960) | Show on map | Quakes nearby
24 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 (16 mi) SE of San German (San Germán) (pop: 12,100) | Show on map | Quakes nearby
27 km (17 mi) SSW of Adjuntas (pop: 5,080) | Show on map | Quakes nearby
88 km (55 mi) SW of Bayamon (Bayamón) (pop: 203,500) | Show on map | Quakes nearby
97 km (60 mi) SW of San Juan (pop: 418,100) | Show on map | Quakes nearby
49 km (31 mi) SW of Puerto Rico Island (pop: 3,474,200) | Show on map | Quakes nearby
Weather at epicenter at time of quakeClear Sky 28.9°C (84 F), humidity: 57%, wind: 2 m/s (4 kts) from ESE
Estimated seismic energy released7.1 x 1011 joules (197 megawatt hours, equivalent to 169 tons of TNT) | about seismic energy
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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
4.79 km- 5 km SSW of Indios, Puerto RicoUSGS
4.810 kmPUERTO RICO REGIONEMSC
4.910 kmPuerto Rico RegionGFZ

Seismograms

Seismic station: San Juan, Puerto Rico (SJG/IU network) | Distance from quake: 75 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 (20)

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
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MANATI / Light shaking (MMI IV) / 1-2 s : 1st shake almost light undetectable floor shake. 2nd shake more pronounced table shook more forceful. sitting in recliner | One user found this interesting.  
San Sebastián / Weak shaking (MMI III) / 2-5 s : Sitting on front porch and my dog started whining. Felt the ground shake slightly for a few seconds. Power lines swayed slightly | One user found this interesting.  
Manati PR (65.3 km NE of epicenter) [Map] / Weak shaking (MMI III) / 2-5 s : I felt like a small jump then waves of movement. | One user found this interesting. (reported through our app)  
Cabo Rojo, Puerto Rico / Strong shaking (MMI VI) : Palm trees in front the house swaying like when Maria hit | One user found this interesting.  
Puerto Rico, San Juan Antiguo Barrio, San Juan (101.3 km NE of epicenter) [Map] / Very weak shaking (MMI II) / 2-5 s
Cataño (94.5 km NE of epicenter) [Map] / Very weak shaking (MMI II) / 2-5 s (reported through our app)
Comunas, Playa Barrio, Yabucoa (110.8 km E of epicenter) [Map] / Very weak shaking (MMI II) / very short (reported through our app)
Guaynabo (94.4 km ENE of epicenter) [Map] / Very weak shaking (MMI II) / complex motion difficult to describe / 1-2 s
San Sebastian (46.6 km NNW of epicenter) [Map] / Weak shaking (MMI III) / 1-2 s (reported through our app)
Playita Cortada, Descalabrado Barrio, Santa Isabel (43.2 km E of epicenter) [Map] / Very weak shaking (MMI II) / horizontal (sideways) swinging / 1-2 s
Moca, Moca Barrio-Pueblo (56.6 km NNW of epicenter) [Map] / Light shaking (MMI IV) (reported through our app)
Ponce, Segundo Barrio (27.4 km ENE of epicenter) [Map] / Moderate shaking (MMI V) (reported through our app)
Santo Domingo, Peñuelas (18.5 km NNE of epicenter) [Map] / Moderate shaking (MMI V) / 5-10 s
Bayamon, Bayamón Barrio-Pueblo (84.7 km ENE of epicenter) [Map] / Light shaking (MMI IV) / 15-20 s (reported through our app)
Yauco / Weak shaking (MMI III) / vibration and rolling / very short : Felt like being on a construction site with a large truck rolling by along with the noise  
Sabana Grande,PR (21.6 km NW of epicenter) [Map] / Light shaking (MMI IV) : Shaking, vibrating, lasted about 6 seconds. No noise wich is kind of strange. (reported through our app)  
utuado puerto rico 00461 / Light shaking (MMI IV) / 5-10 s
Arecibo / Strong shaking (MMI VI) / single lateral shake / very short
Ponce / Weak shaking (MMI III)
Quebradillas / Weak shaking (MMI III) / single lateral shake / 2-5 s

Earlier earthquakes in the same area

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