QuakeIndex

Earthquake · reviewed by a seismologist

M 3.2md

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 3.2 earthquake was recorded 9 km (6 mi) west-southwest of Culebra, PR, at 1:42 am AST on 23 March 2024 (05:42 UTC), 10 km deep.

USGS: 8 km WSW of Culebra, Puerto Rico

73 km (46 mi) E of San Juan, PR

1:42 am AST, Mar 23, 2024 · · 10 km deep · released about 1,800 lb of TNT

Every earthquake near Culebra Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Culebra Municipio 10 kmVieques Municipio 18 kmFajardo Municipio 25 kmCeiba Municipio 25 kmLuquillo Municipio 36 kmNaguabo Municipio 38 kmRío Grande Municipio 45 kmHumacao Municipio 46 kmLas Piedras Municipio 53 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
1:42 am AST on 23 March 2024 ()
Where
9 km (6 mi) west-southwest of Culebra, PR · earthquakes near Culebra
Magnitude
M 3.2 (md)
Depth
10 km below the surface
Felt
no reports yet
Nearest
Culebra Municipio, 10 km NE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 963 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 44 km (27 mi) from the epicentre. In Culebra, 9 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: Culebra 9 km, intensity III · Isabel Segunda 16 km, intensity III · Esperanza 22 km, intensity II · Aguas Claras 29 km, intensity II · Fajardo 29 km, intensity II · Luquillo 37 km, intensity II. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 1,800 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.2 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 190,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 8,500× the energy of this one
  3. Magna, Utah 2020 M 5.7 6,000× the energy of this one
  4. This earthquake M 3.2 about 1,800 lb of TNT
  5. Around the size people start to feel M 3.0 this one released 1.9× 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 4.8 on 2021-10-08 — about 270 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 18.2758, -65.3808. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Culebra Municipio, PR 10 km (6 mi) NE earthquakes near Culebra Municipio
Vieques Municipio, PR 18 km (11 mi) SSW earthquakes near Vieques Municipio
Fajardo Municipio, PR 25 km (16 mi) WNW earthquakes near Fajardo Municipio
Ceiba Municipio, PR 25 km (16 mi) W earthquakes near Ceiba Municipio
Luquillo Municipio, PR 36 km (23 mi) WNW earthquakes near Luquillo Municipio
Naguabo Municipio, PR 38 km (24 mi) W earthquakes near Naguabo Municipio

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

Aftershocks so far

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

  1. 2.4 11 km SSE of Punta Santiago, Puerto Rico
  2. 3.4 14 km SE of Esperanza, Puerto Rico
  3. 3.2 17 km SE of Esperanza, Puerto Rico
  4. 2.9 14 km SE of Esperanza, Puerto Rico
  5. 3.2 19 km SSE of Esperanza, Puerto Rico
  6. 3.0 14 km SE of Esperanza, Puerto Rico
  7. 3.0 15 km SE of Esperanza, Puerto Rico
  8. 3.6 17 km SE of Esperanza, Puerto Rico
  9. 3.4 14 km SE of Esperanza, Puerto Rico
  10. 2.9 14 km SE of Esperanza, Puerto Rico
  11. 2.5 32 km NNW of Charlotte Amalie, U.S. Virgin Islands
  12. 2.9 34 km NNE of Luquillo, Puerto Rico
  13. 2.7 10 km SSE of Esperanza, Puerto Rico
  14. 3.4 39 km N of Culebra, Puerto Rico
  15. 3.2 41 km NNE of Culebra, 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.