QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1md

Earthquake near Comunas, PR

Yes: an earthquake was likely felt in Comunas in the last 24 hours. M 2.9, 29 km (18 mi) SSE of Comunas, at 5:20 pm AST on 11 November 2026 (21:20 UTC); the estimated shaking in Comunas was intensity II (weak). 1 person has reported feeling it to USGS. Every earthquake near Comunas

This page: a magnitude 2.1 earthquake was recorded 9 km (5 mi) east-southeast of Comunas, PR, at 10:24 pm AST on 7 December 2025 (02:24 UTC), 20 km deep.

USGS: 8 km ESE of Comunas, Puerto Rico

50 km (31 mi) SE of San Juan, PR · 35 km (21 mi) SE of Caguas, PR

10:24 pm AST, Dec 7, 2025 · · 20 km deep · released about 43 lb of TNT

Every earthquake near Comunas Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Humacao Municipio 9 kmYabucoa Municipio 10 kmMaunabo Municipio 15 kmNaguabo Municipio 18 kmLas Piedras Municipio 18 kmJuncos Municipio 24 kmPatillas Municipio 24 kmSan Lorenzo Municipio 24 kmCeiba Municipio 27 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
10:24 pm AST on 7 December 2025 ()
Where
9 km (5 mi) east-southeast of Comunas, PR · earthquakes near Comunas
Magnitude
M 2.1 (md)
Depth
20 km below the surface
Felt
no reports yet
Nearest
Humacao Municipio, 9 km NNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 339 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

At this magnitude and depth it was probably too small to be felt, even directly above it. In Comunas, 9 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: Candelero Arriba, El Negro, Bajandas, Yabucoa, Humacao, Punta Santiago.

How big was it?

This earthquake released about 43 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.1 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 350,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 250,000× the energy of this one
  3. Around the size people start to feel M 3.0 22× the energy of this one
  4. This earthquake M 2.1 about 43 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 4.8 on 2021-10-08 — about 11,000 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 · 45 km WNW 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 18.0565, -65.7695. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Humacao Municipio, PR 9 km (6 mi) NNW earthquakes near Humacao Municipio
Yabucoa Municipio, PR 10 km (6 mi) W earthquakes near Yabucoa Municipio
Maunabo Municipio, PR 15 km (9 mi) WSW earthquakes near Maunabo Municipio
Naguabo Municipio, PR 18 km (11 mi) NNE earthquakes near Naguabo Municipio
Las Piedras Municipio, PR 18 km (11 mi) NW earthquakes near Las Piedras Municipio
Juncos Municipio, PR 24 km (15 mi) NW earthquakes near Juncos Municipio

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

Aftershocks so far

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

  1. 2.5 11 km SSE of Esperanza, Puerto Rico
  2. 2.9 21 km SW of Esperanza, Puerto Rico
  3. 3.7 29 km SSW of Esperanza, Puerto Rico
  4. 2.7 3 km SE of Jobos, Puerto Rico
  5. 1.5 1 km NE of Vázquez, Puerto Rico
  6. 2.1 1 km SE of Aguas Buenas, Puerto Rico
  7. 1.6 2 km ESE of Jobos, Puerto Rico
  8. 2.1 2 km SE of Jobos, Puerto Rico
  9. 2.5 1 km W of Santa Clara, Puerto Rico
  10. 2.6 2 km WSW of G. L. Garcia, Puerto Rico
  11. 2.0 11 km SSE of Punta Santiago, Puerto Rico
  12. 2.0 0 km WSW of Aguas Buenas, Puerto Rico
  13. 1.9 0 km SW of G. L. Garcia, Puerto Rico
  14. 2.6 26 km SE of El Negro, Puerto Rico
  15. 3.0 30 km SSW of Esperanza, 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.