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 11:28 am AST (15:28 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 in Corozal, PR, at 1:03 am AST on 30 December 2023 (05:03 UTC), 49 km deep. 1 person has reported feeling it to USGS.

USGS: 1 km SSE of Corozal, Puerto Rico

27 km (17 mi) WSW of San Juan, PR · 16 km (10 mi) WSW of Bayamón, PR

1:03 am AST, Dec 30, 2023 · · 49 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 Corozal Municipio 3 kmNaranjito Municipio 7 kmToa Alta Municipio 8 kmMorovis Municipio 12 kmVega Alta Municipio 12 kmBarranquitas Municipio 14 kmComerío Municipio 15 kmBayamón Municipio 15 kmVega Baja Municipio 17 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
1:03 am AST on 30 December 2023 ()
Where
in Corozal, PR · earthquakes near Corozal
Magnitude
M 3.0 (md)
Depth
49 km below the surface
Felt
1 report · strongest reported intensity II
Nearest
Corozal Municipio, 3 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1047 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. 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: H. Rivera Colon, Galateo, Naranjito, Río Lajas, Toa Alta, Vega Alta.

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

The largest earthquake within 50 km since 2016 was M 4.6 on 2019-03-12 — about 250 times the energy of this one.

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 · 37 km NW of this epicentre
  2. 5.1 3 km W of Aguas Buenas, Puerto Rico · 20 km ESE of this epicentre
  3. 5.0 3 km N of Brenas, Puerto Rico · 19 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 18.3295, -66.3097. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Corozal Municipio, PR 3 km (2 mi) SSW earthquakes near Corozal Municipio
Naranjito Municipio, PR 7 km (5 mi) SE earthquakes near Naranjito Municipio
Toa Alta Municipio, PR 8 km (5 mi) ENE earthquakes near Toa Alta Municipio
Morovis Municipio, PR 12 km (7 mi) W earthquakes near Morovis Municipio
Vega Alta Municipio, PR 12 km (8 mi) NNW earthquakes near Vega Alta Municipio
Barranquitas Municipio, PR 14 km (9 mi) S earthquakes near Barranquitas Municipio

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

Aftershocks so far

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

  1. 2.6 5 km WSW of Orocovis, Puerto Rico
  2. 2.1 6 km SSE of Salinas, Puerto Rico
  3. 2.3 6 km SSE of Salinas, Puerto Rico
  4. 3.1 7 km NNE of Utuado, Puerto Rico
  5. 2.0 4 km SSE of Salinas, Puerto Rico
  6. 2.6 3 km SSE of Salinas, Puerto Rico
  7. 1.8 2 km E of Cayey, Puerto Rico
  8. 2.2 7 km SSE of Salinas, Puerto Rico
  9. 1.5 5 km SE of Cayey, Puerto Rico
  10. 2.8 4 km WSW of Central Aguirre, Puerto Rico
  11. 2.1 4 km NW of Orocovis, Puerto Rico
  12. 3.2 2 km SSE of Coto Norte, Puerto Rico
  13. 2.6 4 km NW of Orocovis, 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.