Quake Info: Moderate Mag. 4.2 Earthquake - 32 km Southwest of Ponce, Puerto Rico, on 6 Oct 7:03 pm (GMT -4)

Moderate magnitude 4.2 earthquake at 14 km depth

6 Oct 23:19 UTC: First to report: EMSC after 16 minutes.

Earthquake details

Date & time	Oct 6, 2020 23:03:02 UTC
Local time at epicenter	6 Oct 7:03 pm (GMT -4)
Status	Confirmed
Magnitude	4.2
Depth	14.0 km
Epicenter latitude / longitude	17.88°N / 66.88°W (Caribbean Sea, Puerto Rico)
Antipode	17.88°S / 113.12°E
Shaking intensity	Light shaking
Felt	9 reports
Primary data source	EMSC (European-Mediterranean Seismological Centre)
Nearest volcano	###NEARESTVOLCANO2###
Nearby towns and cities	11 km (7 mi) SSE of Guanica (pop: 9,220) \| Show on map \| Quakes nearby 18 km (11 mi) S of Yauco (pop: 20,300) \| Show on map \| Quakes nearby 18 km (11 mi) SSW of Guayanilla (pop: 5,210) \| Show on map \| Quakes nearby 24 km (15 mi) SSE of Sabana Grande (pop: 8,960) \| Show on map \| Quakes nearby 26 km (16 mi) SW of Penuelas (Peñuelas) (pop: 6,850) \| Show on map \| Quakes nearby 27 km (17 mi) SE of Lajas (pop: 5,260) \| Show on map \| Quakes nearby 28 km (18 mi) SE of San German (San Germán) (pop: 12,100) \| Show on map \| Quakes nearby 31 km (19 mi) WSW of Ponce (pop: 152,600) \| Show on map \| Quakes nearby 82 km (51 mi) SW of Vega Baja (pop: 29,300) \| Show on map \| Quakes nearby 105 km (65 mi) SW of San Juan (pop: 418,100) \| Show on map \| Quakes nearby 57 km (36 mi) SW of Puerto Rico Island (pop: 3,474,200) \| Show on map \| Quakes nearby 155 km (97 mi) W of Isla de Vieques Island (pop: 9,300) \| Show on map \| Quakes nearby 176 km (109 mi) WSW of Isla de Culebra Island (pop: 1,820) \| Show on map \| Quakes nearby
Weather at epicenter at time of quake	Clear Sky 23.7°C (75 F), humidity: 90%, wind: 6 m/s (12 kts) from E
Estimated seismic energy released	1.3 x 10¹¹ joules (35 megawatt hours, equivalent to 30.1 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.	Depth	Location	Source
4.2	14 km	- 10 km SSE of Guánica, Puerto Rico	EMSC
4.1	6 km	6 Km SSE of Guánica, Puerto Rico	USGS

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Seismograms

Seismic station: San Juan, Puerto Rico (SJG/IU network) | Distance from quake: 81 km / 51 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

User reports for this quake (43)

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.

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Cayey, PR , US (83.2 km ENE of epicenter) [Map] / not felt (reported through our app)

Carolina (139.4 km ENE of epicenter) [Map] / Moderate shaking (MMI V) / 1-2 s : Se movió el edificio donde trabajo y el piso. (reported through our app)

Playita Cortada, Descalabrado Barrio, Santa Isabel (48.3 km ENE of epicenter) [Map] / not felt

San Sebastian (53.7 km NNW of epicenter) [Map] / Very weak shaking (MMI II) / very short : Estaba en el cuarto y se sintió muy débil. En Bo Pozas Central de San Sebastián, P.R. (reported through our app)

Lajas (26.6 km NW of epicenter) [Map] / Moderate shaking (MMI V) (reported through our app)

Yauco, Yauco Barrio-Pueblo (17.3 km N of epicenter) [Map] / Moderate shaking (MMI V) (reported through our app)

loíza, pr / not felt

Ponce / Light shaking (MMI IV)

Cabo Rojo, Puerto Rico / Moderate shaking (MMI V)

Mayaguez / Light shaking (MMI IV) / rattling, vibrating / 2-5 s : On 2nd floor in a rolly chair, chair rolled a little bit which was how i noticed it.

Frailes Yauco PR / Light shaking (MMI IV) / rattling, vibrating / 5-10 s : Noticeable floor vibration

Lajas / Moderate shaking (MMI V) / 2-5 s

Hormigueros (Puerto Rico, 39 km NW of epicenter) : Mayagüez, se sintió fuerte. (reported through EMSC)

Yauco (Puerto Rico, 17 km N of epicenter) : Sentido fuerte. (reported through EMSC)

Yauco (Puerto Rico, 17 km N of epicenter) : Fue fuerte! (reported through EMSC)

Mayagüez (Puerto Rico, 45 km NW of epicenter) : Mayagüez, leve pero sentido (reported through EMSC)

Luis M. Cintron (Puerto Rico, 139 km E of epicenter) : fue leve lo senti en mi comedor (reported through EMSC)

Lares (Puerto Rico, 46 km N of epicenter) : Fuerte.bayaney Hatillo (reported through EMSC)

Hormigueros (Puerto Rico, 39 km NW of epicenter) : Mayaguez Sur un fuerte movimiento de lado a lado (reported through EMSC)

(United States of America, 36 km NW of epicenter) : The bed was shaking strongly for over 10 seconds yet people who were standing didn't felt it. (reported through EMSC)

Cabo Rojo (Puerto Rico, 36 km NW of epicenter) : Se sintió en Cabo Rojo. (reported through EMSC)

Cabo Rojo (Puerto Rico, 36 km NW of epicenter) : Se movió la cama (reported through EMSC)

Yauco (Puerto Rico, 17 km N of epicenter) : Rapido,pero fuerte (reported through EMSC)

Yauco (Puerto Rico, 17 km N of epicenter) : Ruido y luego el temblor fuerte, fue aumentando de intencidad. Yauco barrio Barinas (reported through EMSC)

Palomas (Puerto Rico, 15 km N of epicenter) : Super fuerte (reported through EMSC)

Guánica (Puerto Rico, 11 km NW of epicenter) : Fue bastante fuerte (reported through EMSC)

Arecibo (Puerto Rico, 68 km N of epicenter) : Soy de Arecibo y se me movió el sofá y mi esposo dijo que se movió la cama (reported through EMSC)

(United States of America, 62 km NE of epicenter) : Suave pero par de segundos (reported through EMSC)

Moca (Puerto Rico, 62 km NW of epicenter) : It was not strong. (reported through EMSC)

Hato Arriba (Puerto Rico, 55 km NW of epicenter) : Moca, Puerto Rico (reported through EMSC)

Espino (Puerto Rico, 51 km NW of epicenter) : leve pero fuerte corcovada de añasco p r (reported through EMSC)

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