QuakeIndex

Earthquake · reviewed by a seismologist

M 2.5md

Earthquake near Aguas Buenas, PR

No earthquake was likely felt in Aguas Buenas in the 24 hours to 10:43 am AST (14:43 UTC). The last one was M 4.1, 87 km (54 mi) ESE, at 5:44 am AST on 28 October 2026, estimated intensity II (weak) in town; 5 felt reports to USGS. Every earthquake near Aguas Buenas

This page: a magnitude 2.5 earthquake was recorded 7 km (4 mi) west-northwest of Aguas Buenas, PR, at 12:05 pm AST on 1 September 2025 (16:05 UTC), 58 km deep.

USGS: 6 km WNW of Aguas Buenas, Puerto Rico

18 km (11 mi) SW of San Juan, PR · 12 km (8 mi) S of Bayamón, PR

12:05 pm AST, Sep 1, 2025 · · 58 km deep · released about 190 lb of TNT

Every earthquake near Aguas Buenas Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Aguas Buenas Municipio 4 kmComerío Municipio 8 kmBayamón Municipio 9 kmNaranjito Municipio 10 kmGuaynabo Municipio 10 kmCidra Municipio 11 kmToa Alta Municipio 13 kmCaguas Municipio 14 kmBarranquitas 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
12:05 pm AST on 1 September 2025 ()
Where
7 km (4 mi) west-northwest of Aguas Buenas, PR · earthquakes near Aguas Buenas
Magnitude
M 2.5 (md)
Depth
58 km below the surface
Felt
no reports yet
Nearest
Aguas Buenas Municipio, 4 km ESE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 436 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 Aguas Buenas, 7 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: Sumidero, Santa Clara, Comerío, Naranjito, Cidra, Guaynabo.

How big was it?

This earthquake released about 190 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 78,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 55,000× the energy of this one
  3. Around the size people start to feel M 3.0 4.9× the energy of this one
  4. This earthquake M 2.5 about 190 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 2016-12-05 — about 1,200 times the energy of this one.

Before 2016, the USGS record lists 2 earthquakes of M5 or more within 50 km:

  1. 5.1 3 km W of Aguas Buenas, Puerto Rico · 3 km ESE of this epicentre
  2. 5.0 3 km N of Brenas, Puerto Rico · 32 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 18.2702, -66.1645. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Aguas Buenas Municipio, PR 4 km (3 mi) ESE earthquakes near Aguas Buenas Municipio
Comerío Municipio, PR 8 km (5 mi) SW earthquakes near Comerío Municipio
Bayamón Municipio, PR 9 km (5 mi) N earthquakes near Bayamón Municipio
Naranjito Municipio, PR 10 km (6 mi) WNW earthquakes near Naranjito Municipio
Guaynabo Municipio, PR 10 km (6 mi) NNE earthquakes near Guaynabo Municipio
Cidra Municipio, PR 11 km (7 mi) S earthquakes near Cidra Municipio

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

Aftershocks so far

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

  1. 1.9 3 km E of G. L. Garcia, Puerto Rico
  2. 2.8 2 km NW of Levittown, Puerto Rico
  3. 2.0 9 km S of Emajagua, Puerto Rico
  4. 2.7 4 km ESE of Jagual, Puerto Rico
  5. 3.0 10 km NNE of Brenas, Puerto Rico
  6. 2.5 2 km SSW of Cayey, Puerto Rico
  7. 3.3 9 km N of Tierras Nuevas Poniente, Puerto Rico
  8. 2.9 6 km NNW of Loíza, Puerto Rico
  9. 2.6 5 km NNW of Coamo, Puerto Rico
  10. 1.8 2 km NNW of La Plena, Puerto Rico
  11. 3.5 22 km N of Brenas, Puerto Rico
  12. 2.8 4 km SSE of Cayey, Puerto Rico
  13. 2.3 6 km ENE of Naranjito, Puerto Rico
  14. 1.8 1 km WSW of G. L. Garcia, Puerto Rico
  15. 2.7 1 km E of Palmas, 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.