QuakeIndex

Earthquake · reviewed by a seismologist

M 2.9md

Earthquake near Bayamón, PR

No earthquake was likely felt in Bayamón in the 24 hours to 10:42 am AST (14:42 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 2.9 earthquake was recorded 25 km (16 mi) south of Bayamón, PR, at 10:58 pm AST on 26 October 2025 (02:58 UTC), 18 km deep. 1 person has reported feeling it to USGS.

USGS: 1 km WSW of Bayamon, Puerto Rico

27 km (17 mi) SSW of San Juan, PR · 12 km (7 mi) SW of Caguas, PR

10:58 pm AST, Oct 26, 2025 · · 18 km deep · released about 700 lb of TNT

Every earthquake near Bayamón Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Cidra Municipio 3 kmCayey Municipio 8 kmAguas Buenas Municipio 9 kmCaguas Municipio 9 kmComerío Municipio 11 kmAibonito Municipio 15 kmSan Lorenzo Municipio 17 kmNaranjito Municipio 18 kmGuaynabo 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
10:58 pm AST on 26 October 2025 ()
Where
25 km (16 mi) south of Bayamón, PR · earthquakes near Bayamón
Magnitude
M 2.9 (md)
Depth
18 km below the surface
Felt
1 report · strongest reported intensity III
Nearest
Cidra Municipio, 3 km W
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 380 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 27 km (17 mi) from the epicentre. In Bayamón, 25 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: Sumidero 5 km, intensity II · Cayey 8 km, intensity II · Caguas 11 km, intensity II · Jagual 14 km, intensity II · Guaynabo 21 km, intensity II · Guayama 21 km, intensity II · Trujillo Alto 24 km, intensity II · Bayamón 25 km, intensity II. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 700 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 22,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 15,000× the energy of this one
  3. Around the size people start to feel M 3.0 1.4× the energy of this one
  4. This earthquake M 2.9 about 700 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 340 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 · 10 km N of this epicentre
  2. 5.0 3 km N of Brenas, Puerto Rico · 43 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 18.1737, -66.1308. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Cidra Municipio, PR 3 km (2 mi) W earthquakes near Cidra Municipio
Cayey Municipio, PR 8 km (5 mi) SSW earthquakes near Cayey Municipio
Aguas Buenas Municipio, PR 9 km (6 mi) N earthquakes near Aguas Buenas Municipio
Caguas Municipio, PR 9 km (6 mi) ENE earthquakes near Caguas Municipio
Comerío Municipio, PR 11 km (7 mi) WNW earthquakes near Comerío Municipio
Aibonito Municipio, PR 15 km (9 mi) WSW earthquakes near Aibonito Municipio

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

Aftershocks so far

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

  1. 1.9 3 km WNW of Orocovis, Puerto Rico
  2. 2.4 1 km WSW of Las Ochenta, Puerto Rico
  3. 1.9 3 km SSW of Salinas, Puerto Rico
  4. 2.0 4 km WNW of Yaurel, Puerto Rico
  5. 3.1 9 km SSE of Daguao, Puerto Rico
  6. 2.8 10 km N of Brenas, Puerto Rico
  7. 2.6 2 km SW of Campo Rico, Puerto Rico
  8. 2.2 3 km S of Río Cañas Abajo, Puerto Rico
  9. 1.9 4 km SE of Jagual, Puerto Rico
  10. 2.6 5 km NNW of Aguas Buenas, Puerto Rico
  11. 2.7 5 km WSW of Central Aguirre, Puerto Rico
  12. 2.1 5 km WSW of Central Aguirre, Puerto Rico
  13. 2.3 2 km S of G. L. Garcia, Puerto Rico
  14. 1.9 1 km ENE of Cayey, Puerto Rico
  15. 1.8 2 km E of Cayey, 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.