QuakeIndex

Earthquake · reviewed by a seismologist

M 2.7md

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 2.7 earthquake was recorded 9 km (6 mi) south of Culebra, PR, at 5:10 pm AST on 27 March 2023 (21:10 UTC), 10 km deep.

USGS: 9 km S of Culebra, Puerto Rico

83 km (52 mi) ESE of San Juan, PR

5:10 pm AST, Mar 27, 2023 · · 10 km deep · released about 340 lb of TNT

Every earthquake near Culebra Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Culebra Municipio 12 kmVieques Municipio 18 kmCeiba Municipio 34 kmFajardo Municipio 36 kmNaguabo Municipio 46 kmLuquillo Municipio 46 kmHumacao Municipio 52 kmRío Grande Municipio 56 kmLas Piedras Municipio 61 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
5:10 pm AST on 27 March 2023 ()
Where
9 km (6 mi) south of Culebra, PR · earthquakes near Culebra
Magnitude
M 2.7 (md)
Depth
10 km below the surface
Felt
no reports yet
Nearest
Culebra Municipio, 12 km N
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1325 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 23 km (14 mi) from the epicentre. In Culebra, 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.

Likely felt in: Culebra 9 km, intensity II · Isabel Segunda 17 km, intensity II · Esperanza 23 km, intensity II. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 340 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.7 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 45,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 32,000× the energy of this one
  3. Around the size people start to feel M 3.0 2.8× the energy of this one
  4. This earthquake M 2.7 about 340 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 1,400 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 18.2198, -65.2990. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Culebra Municipio, PR 12 km (7 mi) N earthquakes near Culebra Municipio
Vieques Municipio, PR 18 km (11 mi) SW earthquakes near Vieques Municipio
Ceiba Municipio, PR 34 km (21 mi) W earthquakes near Ceiba Municipio
Fajardo Municipio, PR 36 km (22 mi) WNW earthquakes near Fajardo Municipio
Naguabo Municipio, PR 46 km (29 mi) W earthquakes near Naguabo Municipio
Luquillo Municipio, PR 46 km (29 mi) WNW earthquakes near Luquillo Municipio

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

Aftershocks so far

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

  1. 3.7 4 km SW of Ramos, Puerto Rico
  2. 2.9 15 km S of Esperanza, Puerto Rico
  3. 2.3 6 km SSE of Bajandas, Puerto Rico
  4. 2.9 19 km ENE of Fajardo, Puerto Rico
  5. 3.3 28 km NNW of Charlotte Amalie, U.S. Virgin Islands
  6. 2.9 8 km SE of Esperanza, Puerto Rico
  7. 2.8 5 km S of Punta Santiago, Puerto Rico
  8. 3.4 23 km SSW of Charlotte Amalie, U.S. Virgin Islands
  9. 3.7 26 km SSW of Esperanza, Puerto Rico
  10. 3.3 14 km SSE of Esperanza, Puerto Rico
  11. 3.1 15 km SE of Esperanza, Puerto Rico
  12. 3.2 22 km SSE of Esperanza, Puerto Rico
  13. 3.5 9 km ENE of Luis M. Cintron, Puerto Rico
  14. 2.6 10 km ESE of Esperanza, Puerto Rico
  15. 3.3 28 km S of Charlotte Amalie, U.S. Virgin Islands

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.