QuakeIndex

Earthquake · reviewed by a seismologist

M 2.5md

Earthquake near Guayama, PR

No earthquake was likely felt in Guayama in the 24 hours to 2:27 pm AST (18:27 UTC). The last one was M 3.3, 35 km (22 mi) WSW, at 8:40 am AST on 1 November 2026, estimated intensity II (weak) in town. Every earthquake near Guayama

This page: a magnitude 2.5 earthquake was recorded 33 km (21 mi) south-southeast of Guayama, PR, at 10:02 pm AST on 14 October 2025 (02:02 UTC), 34 km deep.

USGS: 29 km S of Arroyo, Puerto Rico

79 km (49 mi) S of San Juan, PR · 59 km (37 mi) S of Caguas, PR

10:02 pm AST, Oct 14, 2025 · · 34 km deep · released about 170 lb of TNT

Every earthquake near Guayama Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Arroyo Municipio 31 kmGuayama Municipio 33 kmPatillas Municipio 34 kmMaunabo Municipio 36 kmSalinas Municipio 39 kmYabucoa Municipio 44 kmCayey Municipio 47 kmSanta Isabel Municipio 48 kmSan Lorenzo Municipio 50 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
10:02 pm AST on 14 October 2025 ()
Where
33 km (21 mi) south-southeast of Guayama, PR · earthquakes near Guayama
Magnitude
M 2.5 (md)
Depth
34 km below the surface
Felt
no reports yet
Nearest
Arroyo Municipio, 31 km N
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 393 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 Guayama, 33 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.

How big was it?

This earthquake released about 170 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 89,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 63,000× the energy of this one
  3. Around the size people start to feel M 3.0 5.6× the energy of this one
  4. This earthquake M 2.5 about 170 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 1,400 times the energy of this one.

Before 2016, the USGS record lists one earthquake of M5 or more within 50 km:

  1. 5.3 68 km SSE of Emajagua, Puerto Rico · 47 km SE 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 17.6975, -66.0265. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Arroyo Municipio, PR 31 km (19 mi) N earthquakes near Arroyo Municipio
Guayama Municipio, PR 33 km (20 mi) NNW earthquakes near Guayama Municipio
Patillas Municipio, PR 34 km (21 mi) N earthquakes near Patillas Municipio
Maunabo Municipio, PR 36 km (23 mi) NNE earthquakes near Maunabo Municipio
Salinas Municipio, PR 39 km (24 mi) NW earthquakes near Salinas Municipio
Yabucoa Municipio, PR 44 km (27 mi) NNE earthquakes near Yabucoa Municipio

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

Aftershocks so far

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

  1. 3.7 29 km SSW of Esperanza, Puerto Rico
  2. 2.7 3 km SE of Jobos, Puerto Rico
  3. 1.5 1 km NE of Vázquez, Puerto Rico
  4. 1.6 2 km ESE of Jobos, Puerto Rico
  5. 2.1 2 km SE of Jobos, Puerto Rico
  6. 1.5 6 km S of Central Aguirre, Puerto Rico
  7. 2.6 2 km WSW of G. L. Garcia, Puerto Rico
  8. 2.0 2 km SSW of Vázquez, Puerto Rico
  9. 1.9 0 km SW of G. L. Garcia, Puerto Rico
  10. 2.6 26 km SE of El Negro, Puerto Rico
  11. 3.0 30 km SSW of Esperanza, Puerto Rico
  12. 1.6 1 km SW of G. L. Garcia, Puerto Rico
  13. 1.8 7 km ESE of G. L. Garcia, Puerto Rico
  14. 2.4 3 km SSE of Salinas, Puerto Rico
  15. 1.7 1 km WSW of G. L. Garcia, 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.