QuakeIndex

Earthquake · reviewed by a seismologist

M 3.0md

Earthquake near Bayamón, PR

No earthquake was likely felt in Bayamón in the 24 hours to 12:49 pm AST (16:49 UTC). The last one was M 4.8, 98 km (61 mi) WSW, at 9:19 am AST on 18 September 2026, estimated intensity III (weak) in town; 86 felt reports to USGS. Every earthquake near Bayamón

This page: a magnitude 3.0 earthquake was recorded 19 km (12 mi) southwest of Bayamón, PR, at 3:50 am AST on 21 June 2025 (07:50 UTC), 15 km deep. 1 person has reported feeling it to USGS.

USGS: 3 km N of Palomas, Puerto Rico

26 km (16 mi) SW of San Juan, PR · 17 km (10 mi) SW of Bayamón, PR

3:50 am AST, Jun 21, 2025 · · 15 km deep · released about 950 lb of TNT

Every earthquake near Bayamón Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Naranjito Municipio 3 kmComerío Municipio 6 kmBarranquitas Municipio 8 kmCorozal Municipio 9 kmToa Alta Municipio 12 kmBayamón Municipio 14 kmAguas Buenas Municipio 14 kmCidra Municipio 14 kmAibonito Municipio 14 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
3:50 am AST on 21 June 2025 ()
Where
19 km (12 mi) southwest of Bayamón, PR · earthquakes near Bayamón
Magnitude
M 3.0 (md)
Depth
15 km below the surface
Felt
1 report · strongest reported intensity II
Nearest
Naranjito Municipio, 3 km NNE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 508 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, people at rest would likely notice it out to about 34 km (21 mi) from the epicentre. In Bayamón, 19 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.

Likely felt in: Corozal 11 km, intensity II · Sumidero 15 km, intensity II · Bayamón 19 km, intensity II · Guaynabo 19 km, intensity II · Cayey 19 km, intensity II · San Antonio 21 km, intensity II · Dorado 22 km, intensity II · Caguas 23 km, intensity II. Estimated for each town centre; each link is that town's own record.

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 · 47 km NW of this epicentre
  2. 5.1 3 km W of Aguas Buenas, Puerto Rico · 13 km E of this epicentre
  3. 5.0 3 km N of Brenas, Puerto Rico · 28 km NNW 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 18.2603, -66.2600. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Naranjito Municipio, PR 3 km (2 mi) NNE earthquakes near Naranjito Municipio
Comerío Municipio, PR 6 km (4 mi) SE earthquakes near Comerío Municipio
Barranquitas Municipio, PR 8 km (5 mi) SW earthquakes near Barranquitas Municipio
Corozal Municipio, PR 9 km (5 mi) NW earthquakes near Corozal Municipio
Toa Alta Municipio, PR 12 km (7 mi) N earthquakes near Toa Alta Municipio
Bayamón Municipio, PR 14 km (9 mi) NE earthquakes near Bayamón Municipio

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

Aftershocks so far

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

  1. 2.1 3 km S of Potala Pastillo, Puerto Rico
  2. 3.2 4 km NNE of Ponce, Puerto Rico
  3. 3.2 13 km NNW of Brenas, Puerto Rico
  4. 2.0 4 km SW of Jagual, Puerto Rico
  5. 2.4 2 km ENE of Ponce, Puerto Rico
  6. 2.5 2 km ENE of Ponce, Puerto Rico
  7. 2.1 4 km N of Orocovis, Puerto Rico
  8. 1.9 6 km ENE of Orocovis, Puerto Rico
  9. 2.4 1 km W of Río Cañas Abajo, Puerto Rico
  10. 2.1 2 km N of Santa Clara, Puerto Rico
  11. 1.9 0 km ESE of Vázquez, Puerto Rico
  12. 2.2 6 km SSW of Playita Cortada, Puerto Rico
  13. 2.2 0 km NNW of Potala Pastillo, Puerto Rico
  14. 2.4 0 km E of Potala Pastillo, Puerto Rico
  15. 2.2 4 km SSW of Las Ochenta, 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.