QuakeIndex

Earthquake · reviewed by a seismologist

M 3.1md

Earthquake near Florida, PR

No earthquake was likely felt in Florida in the 24 hours to 8:30 am AST (12:30 UTC). The last one was M 2.9, 21 km (13 mi) NNW, at 2:05 am AST on 13 October 2026, estimated intensity II (weak) in town. Every earthquake near Florida

This page: a magnitude 3.1 earthquake was recorded 4 km (3 mi) south-southwest of Florida, PR, at 5:58 am AST on 4 December 2022 (09:58 UTC), 123 km deep. 1 person has reported feeling it to USGS.

USGS: 4 km SSW of Florida, Puerto Rico

55 km (34 mi) W of San Juan, PR · 22 km (14 mi) SE of Arecibo, PR

5:58 am AST, Dec 4, 2022 · · 123 km deep · released about 1,400 lb of TNT

Every earthquake near Florida Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Florida Municipio 5 kmCiales Municipio 7 kmJayuya Municipio 13 kmUtuado Municipio 15 kmManatí Municipio 16 kmArecibo Municipio 16 kmBarceloneta Municipio 16 kmMorovis Municipio 16 kmOrocovis 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
5:58 am AST on 4 December 2022 ()
Where
4 km (3 mi) south-southwest of Florida, PR · earthquakes near Florida
Magnitude
M 3.1 (md)
Depth
123 km below the surface
Felt
1 report · strongest reported intensity I
Nearest
Florida Municipio, 5 km NNE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1438 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 Florida, 4 km away, the estimate is intensity I (not felt). 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: Estancias de Florida, La Alianza, Bufalo, Ciales, Jayuya, Imbery.

How big was it?

This earthquake released about 1,400 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.1 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 230,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 10,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 7,400× the energy of this one
  4. This earthquake M 3.1 about 1,400 lb of TNT
  5. Around the size people start to feel M 3.0 this one released 1.5× more

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 6.4 on 2020-01-07 — about 83,000 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 · 26 km N of this epicentre
  2. 5.1 3 km W of Aguas Buenas, Puerto Rico · 47 km E of this epicentre
  3. 5.0 3 km N of Brenas, Puerto Rico · 31 km NE 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 18.3255, -66.5743. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Florida Municipio, PR 5 km (3 mi) NNE earthquakes near Florida Municipio
Ciales Municipio, PR 7 km (4 mi) ESE earthquakes near Ciales Municipio
Jayuya Municipio, PR 13 km (8 mi) S earthquakes near Jayuya Municipio
Utuado Municipio, PR 15 km (9 mi) WSW earthquakes near Utuado Municipio
Manatí Municipio, PR 16 km (10 mi) NNE earthquakes near Manatí Municipio
Arecibo Municipio, PR 16 km (10 mi) NW earthquakes near Arecibo Municipio

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

Aftershocks so far

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

  1. 2.2 6 km SE of Maricao, Puerto Rico
  2. 2.5 0 km WNW of Magas Arriba, Puerto Rico
  3. 2.3 1 km WSW of Magas Arriba, Puerto Rico
  4. 1.8 2 km WSW of Indios, Puerto Rico
  5. 2.0 3 km SW of Indios, Puerto Rico
  6. 2.8 24 km N of Hatillo, Puerto Rico
  7. 2.2 0 km ESE of Magas Arriba, Puerto Rico
  8. 2.4 2 km ENE of Magas Arriba, Puerto Rico
  9. 2.4 0 km NW of Guayanilla, Puerto Rico
  10. 2.4 2 km S of Indios, Puerto Rico
  11. 2.0 1 km NNW of Indios, Puerto Rico
  12. 2.1 2 km ENE of Magas Arriba, Puerto Rico
  13. 2.0 2 km ENE of Magas Arriba, Puerto Rico
  14. 3.4 Puerto Rico region
  15. 2.6 2 km SSW of Tallaboa, 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.