QuakeIndex

Earthquake · reviewed by a seismologist

M 3.1md

Earthquake near Arroyo, PR

No earthquake was likely felt in Arroyo in the 24 hours to 10:10 am AST (14:10 UTC). The last one was M 3.3, 39 km (24 mi) WSW, at 8:40 am AST on 1 November 2026, estimated intensity II (weak) in town. Every earthquake near Arroyo

This page: a magnitude 3.1 earthquake was recorded 14 km (9 mi) south of Arroyo, PR, at 2:23 am AST on 11 November 2025 (06:23 UTC), 11 km deep. 1 person has reported feeling it to USGS.

USGS: 13 km S of Arroyo, Puerto Rico

63 km (39 mi) S of San Juan, PR · 44 km (27 mi) S of Caguas, PR

2:23 am AST, Nov 11, 2025 · · 11 km deep · released about 1,200 lb of TNT

Every earthquake near Arroyo Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Arroyo Municipio 15 kmGuayama Municipio 17 kmPatillas Municipio 20 kmMaunabo Municipio 25 kmSalinas Municipio 25 kmCayey Municipio 31 kmYabucoa Municipio 33 kmSan Lorenzo Municipio 35 kmSanta Isabel Municipio 36 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
2:23 am AST on 11 November 2025 ()
Where
14 km (9 mi) south of Arroyo, PR · earthquakes near Arroyo
Magnitude
M 3.1 (md)
Depth
11 km below the surface
Felt
1 report · strongest reported intensity II
Nearest
Arroyo Municipio, 15 km N
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 286 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 38 km (24 mi) from the epicentre. In Arroyo, 14 km away, the estimate is intensity III (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: Guayama 17 km, intensity II · Emajagua 26 km, intensity II · Cayey 32 km, intensity II · Jagual 36 km, intensity II. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 1,200 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 6.7 290,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 13,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 9,100× the energy of this one
  4. This earthquake M 3.1 about 1,200 lb of TNT
  5. Around the size people start to feel M 3.0 this one released 1.2× 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 4.6 on 2016-12-05 — about 200 times the energy of this one.

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

  1. 5.1 3 km W of Aguas Buenas, Puerto Rico · 47 km N 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 17.8403, -66.0657. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Arroyo Municipio, PR 15 km (9 mi) N earthquakes near Arroyo Municipio
Guayama Municipio, PR 17 km (10 mi) NNW earthquakes near Guayama Municipio
Patillas Municipio, PR 20 km (12 mi) NNE earthquakes near Patillas Municipio
Maunabo Municipio, PR 25 km (16 mi) NE earthquakes near Maunabo Municipio
Salinas Municipio, PR 25 km (16 mi) NW earthquakes near Salinas Municipio
Cayey Municipio, PR 31 km (19 mi) NNW earthquakes near Cayey 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. 2.1 2 km SE of Jobos, Puerto Rico
  2. 2.5 1 km W of Santa Clara, Puerto Rico
  3. 1.5 6 km S of Central Aguirre, Puerto Rico
  4. 2.6 2 km WSW of G. L. Garcia, Puerto Rico
  5. 2.0 2 km SSW of Vázquez, Puerto Rico
  6. 2.0 11 km SSE of Punta Santiago, Puerto Rico
  7. 2.0 0 km WSW of Aguas Buenas, Puerto Rico
  8. 1.9 0 km SW of G. L. Garcia, Puerto Rico
  9. 2.6 26 km SE of El Negro, Puerto Rico
  10. 3.0 30 km SSW of Esperanza, Puerto Rico
  11. 1.6 1 km SW of G. L. Garcia, Puerto Rico
  12. 1.8 7 km ESE of G. L. Garcia, Puerto Rico
  13. 2.4 3 km SSE of Salinas, Puerto Rico
  14. 1.7 1 km WSW of G. L. Garcia, Puerto Rico
  15. 1.7 2 km NW of Las Ollas, 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.