QuakeIndex

Earthquake · reviewed by a seismologist

M 3.1md

Earthquake near Toa Alta, PR

No earthquake was likely felt in Toa Alta in the 24 hours to 10:12 am AST (14:12 UTC). The last one was M 4.8, 89 km (55 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 Toa Alta

This page: a magnitude 3.1 earthquake was recorded in Toa Alta, PR, at 8:14 pm AST on 8 February 2025 (00:14 UTC), 65 km deep. 2 people have reported feeling it to USGS.

USGS: 1 km S of Toa Alta, Puerto Rico

9 km (6 mi) W of Bayamón, PR

8:14 pm AST, Feb 8, 2025 · · 65 km deep · released about 1,400 lb of TNT

Every earthquake near Toa Alta Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Toa Alta Municipio 1 kmBayamón Municipio 9 kmNaranjito Municipio 10 kmToa Baja Municipio 11 kmDorado Municipio 11 kmVega Alta Municipio 11 kmCorozal Municipio 12 kmCataño Municipio 13 kmGuaynabo Municipio 15 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
8:14 pm AST on 8 February 2025 ()
Where
in Toa Alta, PR · earthquakes near Toa Alta
Magnitude
M 3.1 (md)
Depth
65 km below the surface
Felt
2 reports · strongest reported intensity II
Nearest
Toa Alta Municipio, 1 km SSE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 640 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: Galateo, San José, Río Lajas, Pájaros, Mucarabones, H. Rivera Colon.

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 6.7 240,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 11,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 7,700× 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 4.4 on 2018-12-09 — about 86 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 · 39 km WNW of this epicentre
  2. 5.1 3 km W of Aguas Buenas, Puerto Rico · 18 km SE of this epicentre
  3. 5.0 3 km N of Brenas, Puerto Rico · 17 km NW 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 18.3777, -66.2478. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Toa Alta Municipio, PR 1 km (1 mi) SSE earthquakes near Toa Alta Municipio
Bayamón Municipio, PR 9 km (6 mi) ESE earthquakes near Bayamón Municipio
Naranjito Municipio, PR 10 km (6 mi) S earthquakes near Naranjito Municipio
Toa Baja Municipio, PR 11 km (7 mi) NNE earthquakes near Toa Baja Municipio
Dorado Municipio, PR 11 km (7 mi) N earthquakes near Dorado Municipio
Vega Alta Municipio, PR 11 km (7 mi) NW earthquakes near Vega Alta Municipio

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

Aftershocks so far

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

  1. 2.4 1 km ESE of Coto Laurel, Puerto Rico
  2. 2.9 9 km NNW of Brenas, Puerto Rico
  3. 1.6 2 km S of G. L. Garcia, Puerto Rico
  4. 2.8 19 km N of Dorado, Puerto Rico
  5. 2.2 1 km W of Naranjito, Puerto Rico
  6. 2.2 3 km ESE of G. L. Garcia, Puerto Rico
  7. 2.9 2 km NW of Orocovis, Puerto Rico
  8. 2.1 3 km WNW of Guayabal, Puerto Rico
  9. 2.4 4 km SW of Las Piedras, Puerto Rico
  10. 2.0 3 km W of Orocovis, Puerto Rico
  11. 2.2 4 km SSW of Las Piedras, Puerto Rico
  12. 2.1 4 km SSW of Las Piedras, Puerto Rico
  13. 2.6 3 km SSW of Las Piedras, Puerto Rico
  14. 2.1 4 km SSE of Juncos, Puerto Rico
  15. 2.4 5 km SSW of Las Piedras, 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.