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 8 km (5 mi) southwest of Culebra, PR, at 7:28 am AST on 1 April 2017 (11:28 UTC), 22 km deep.

USGS: 7 km SW of Culebra, Puerto Rico

76 km (47 mi) ESE of San Juan, PR

7:28 am AST, Apr 1, 2017 · · 22 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 28 kmFajardo Municipio 28 kmLuquillo Municipio 39 kmNaguabo Municipio 40 kmHumacao Municipio 47 kmRío Grande Municipio 48 kmLas Piedras Municipio 55 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
7:28 am AST on 1 April 2017 ()
Where
8 km (5 mi) southwest of Culebra, PR · earthquakes near Culebra
Magnitude
M 2.5 (Md)
Depth
22 km below the surface
Felt
no reports yet
Nearest
Culebra Municipio, 9 km NE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3511 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 4 km (2 mi) from the epicentre. In Culebra, 8 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: Isabel Segunda, Esperanza, Luis M. Cintron.

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 4.3 on 2016-09-02 — about 500 times the energy of this one.

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 18.2583, -65.3598. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Culebra Municipio, PR 9 km (6 mi) NE earthquakes near Culebra Municipio
Vieques Municipio, PR 17 km (10 mi) SSW earthquakes near Vieques Municipio
Ceiba Municipio, PR 28 km (17 mi) W earthquakes near Ceiba Municipio
Fajardo Municipio, PR 28 km (17 mi) WNW earthquakes near Fajardo Municipio
Luquillo Municipio, PR 39 km (24 mi) WNW earthquakes near Luquillo Municipio
Naguabo Municipio, PR 40 km (25 mi) W earthquakes near Naguabo Municipio

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

Aftershocks so far

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

  1. 2.3 34 km NNE of Culebra, Puerto Rico
  2. 1.9 19 km SW of Esperanza, Puerto Rico
  3. 2.1 11 km SSE of Esperanza, Puerto Rico
  4. 1.9 26 km SE of El Negro, Puerto Rico
  5. 2.5 37 km N of Culebra, Puerto Rico
  6. 2.6 27 km NNE of Luquillo, Puerto Rico
  7. 2.1 14 km SE of Esperanza, Puerto Rico
  8. 2.2 40 km NNE of Culebra, Puerto Rico
  9. 2.5 29 km NNW of Charlotte Amalie, U.S. Virgin Islands
  10. 2.2 23 km SW of Charlotte Amalie, U.S. Virgin Islands
  11. 2.3 Puerto Rico region
  12. 1.8 19 km S of Charlotte Amalie, U.S. Virgin Islands
  13. 2.2 27 km SW of Esperanza, Puerto Rico
  14. 1.9 10 km S of Esperanza, Puerto Rico
  15. 2.0 26 km SE of El Negro, 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.