QuakeIndex

Earthquake · reviewed by a seismologist

M 2.5Md

Earthquake near Culebra, PR

Yes: an earthquake was likely felt in Culebra in the last 24 hours. M 2.9, 25 km (15 mi) ENE of Culebra, at 6:51 am AST on 11 November 2026 (10:51 UTC); the estimated shaking in Culebra was intensity II (weak). Every earthquake near Culebra

This page: a magnitude 2.5 earthquake was recorded 7 km (4 mi) southwest of Culebra, PR, at 8:35 pm AST on 25 September 2016 (00:35 UTC), 102 km deep.

USGS: 7 km SW of Culebra, Puerto Rico

78 km (48 mi) ESE of San Juan, PR

8:35 pm AST, Sep 25, 2016 · · 102 km deep · released about 170 lb of TNT

Every earthquake near Culebra Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Culebra Municipio 9 kmVieques Municipio 17 kmCeiba Municipio 29 kmFajardo Municipio 30 kmLuquillo Municipio 41 kmNaguabo Municipio 42 kmHumacao Municipio 48 kmRío Grande Municipio 50 kmLas Piedras Municipio 56 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
8:35 pm AST on 25 September 2016 ()
Where
7 km (4 mi) southwest of Culebra, PR · earthquakes near Culebra
Magnitude
M 2.5 (Md)
Depth
102 km below the surface
Felt
no reports yet
Nearest
Culebra Municipio, 9 km NNE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3620 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 Culebra, 7 km away, the estimate is intensity I (not felt). 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: Isabel Segunda, Esperanza.

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

No earthquake of M4 or more has been recorded within 50 km since our catalogue begins in 2016.

Before 2016, the USGS record since 1900 lists no earthquake of M5 or more within 50 km.

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 18.2551, -65.3451. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Culebra Municipio, PR 9 km (6 mi) NNE earthquakes near Culebra Municipio
Vieques Municipio, PR 17 km (11 mi) SSW earthquakes near Vieques Municipio
Ceiba Municipio, PR 29 km (18 mi) W earthquakes near Ceiba Municipio
Fajardo Municipio, PR 30 km (18 mi) WNW earthquakes near Fajardo Municipio
Luquillo Municipio, PR 41 km (25 mi) WNW earthquakes near Luquillo Municipio
Naguabo Municipio, PR 42 km (26 mi) W earthquakes near Naguabo Municipio

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

Aftershocks so far

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

  1. 3.0 27 km NNW of Charlotte Amalie, U.S. Virgin Islands
  2. 2.2 19 km S of Esperanza, Puerto Rico
  3. 1.9 15 km NNW of Charlotte Amalie, U.S. Virgin Islands
  4. 2.7 13 km S of Culebra, Puerto Rico
  5. 2.7 24 km NNE of Luquillo, Puerto Rico
  6. 1.6 31 km SSW of Charlotte Amalie, U.S. Virgin Islands
  7. 2.3 32 km ESE of Esperanza, Puerto Rico
  8. 2.3 24 km ESE of Esperanza, Puerto Rico
  9. 2.8 21 km NNE of Luquillo, Puerto Rico
  10. 2.1 12 km E of El Negro, Puerto Rico
  11. 1.6 23 km NW of Charlotte Amalie, U.S. Virgin Islands
  12. 2.7 12 km SE of Esperanza, Puerto Rico
  13. 2.4 37 km NNW of Charlotte Amalie, U.S. Virgin Islands
  14. 2.3 12 km E of Culebra, Puerto Rico
  15. 2.0 8 km SE 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.