QuakeIndex

Earthquake · reviewed by a seismologist

M 3.0md

Earthquake near Corozal, PR

No earthquake was likely felt in Corozal in the 24 hours to 6:08 am AST (10:08 UTC). The last one was M 4.8, 80 km (50 mi) SW, at 9:19 am AST on 18 September 2026, estimated intensity III (weak) in town; 86 felt reports to USGS. Every earthquake near Corozal

This page: a magnitude 3.0 earthquake was recorded 4 km (3 mi) northwest of Corozal, PR, at 10:05 pm AST on 2 January 2023 (02:05 UTC), 60 km deep. 1 person has reported feeling it to USGS.

USGS: 4 km NW of Corozal, Puerto Rico

30 km (18 mi) W of San Juan, PR · 19 km (12 mi) W of Bayamón, PR

10:05 pm AST, Jan 2, 2023 · · 60 km deep · released about 950 lb of TNT

Every earthquake near Corozal Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Vega Alta Municipio 7 kmCorozal Municipio 8 kmMorovis Municipio 10 kmToa Alta Municipio 10 kmVega Baja Municipio 11 kmNaranjito Municipio 13 kmDorado Municipio 14 kmManatí Municipio 18 kmToa Baja Municipio 19 km
Distance rings around the epicentre, with the nearest towns at their true direction and later quakes as coloured dots. Not a shaking map — see the USGS ShakeMap for that.
When
10:05 pm AST on 2 January 2023 ()
Where
4 km (3 mi) northwest of Corozal, PR · earthquakes near Corozal
Magnitude
M 3.0 (md)
Depth
60 km below the surface
Felt
1 report · strongest reported intensity II
Nearest
Vega Alta Municipio, 7 km N
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1407 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.

At this magnitude and depth it was probably too small to be felt, even directly above it. In Corozal, 4 km away, the estimate is intensity II (weak). Estimated from magnitude, depth and distance with the intensity equation USGS Did You Feel It? uses; felt reports, where there are any, are the measurement.

Earthquakes near other towns within 30 km: Miranda, Vega Alta, Monserrate, H. Rivera Colon, Morovis, Río Lajas.

How big was it?

This earthquake released about 950 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.0 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 350,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 16,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 11,000× the energy of this one
  4. This earthquake M 3.0 about 950 lb of TNT

Energy from the Gutenberg–Richter relation (log10E = 1.5M + 4.8), rounded to two figures; bar length is magnitude, which is already a logarithm of energy. Magnitudes of past earthquakes from the USGS catalogue.

For this area

No earthquake of M4 or more has been recorded within 50 km since our catalogue begins in 2016.

Before 2016, the USGS record lists 3 earthquakes of M5 or more within 50 km:

  1. 5.8 12 km N of Garrochales, Puerto Rico · 32 km NW of this epicentre
  2. 5.1 3 km W of Aguas Buenas, Puerto Rico · 25 km ESE of this epicentre
  3. 5.0 3 km N of Brenas, Puerto Rico · 15 km N of this epicentre

Since 2016: the QuakeIndex catalogue (US, M1.5+), built from the USGS FDSN event service. Before 2016: USGS ComCat, M5+ from 1900. Distances are between epicentres. This is the record, not a forecast.

Where

Epicentre 18.3698, -66.3430. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Vega Alta Municipio, PR 7 km (5 mi) N earthquakes near Vega Alta Municipio
Corozal Municipio, PR 8 km (5 mi) SSE earthquakes near Corozal Municipio
Morovis Municipio, PR 10 km (6 mi) SW earthquakes near Morovis Municipio
Toa Alta Municipio, PR 10 km (6 mi) E earthquakes near Toa Alta Municipio
Vega Baja Municipio, PR 11 km (7 mi) NNW earthquakes near Vega Baja Municipio
Naranjito Municipio, PR 13 km (8 mi) SE earthquakes near Naranjito Municipio

Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.

Aftershocks so far

7 earthquakes have been recorded within 50 km since this one.

  1. 2.2 3 km ENE of Carrizales, Puerto Rico
  2. 3.1 3 km SSW of Cayey, Puerto Rico
  3. 2.6 2 km NNE of Orocovis, Puerto Rico
  4. 2.6 24 km NNE of Dorado, Puerto Rico
  5. 2.8 3 km W of Miranda, Puerto Rico
  6. 2.9 7 km NNW of Dorado, Puerto Rico
  7. 2.6 20 km N of Tierras Nuevas Poniente, Puerto Rico

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of . QuakeIndex does not forecast aftershocks. When USGS issues an operational aftershock forecast it appears on the USGS event page.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.