QuakeIndex

Earthquake · reviewed by a seismologist

M 2.9md

11 km WNW of Culebra, Puerto Rico

· 14 km deep · released about 590 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Culebra Municipio 10 kmFajardo Municipio 21 kmVieques Municipio 25 kmCeiba Municipio 26 kmLuquillo Municipio 33 kmNaguabo Municipio 39 kmRío Grande Municipio 42 kmHumacao Municipio 47 kmCanóvanas Municipio 51 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
Magnitude
M 2.9 (md)
Depth
14 km below the surface
Felt
no reports yet
Nearest
Culebra Municipio, 10 km ESE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1301 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.

How big was it?

This earthquake released about 590 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 26,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 18,000× the energy of this one
  3. Around the size people start to feel M 3.0 1.6× the energy of this one
  4. This earthquake M 2.9 about 590 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.

Where

Epicentre 18.3448, -65.3985. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Culebra Municipio, PR 10 km (6 mi) WNW of here earthquakes near Culebra Municipio
Fajardo Municipio, PR 21 km (13 mi) ESE of here earthquakes near Fajardo Municipio
Vieques Municipio, PR 25 km (15 mi) N of here earthquakes near Vieques Municipio
Ceiba Municipio, PR 26 km (16 mi) ENE of here earthquakes near Ceiba Municipio
Luquillo Municipio, PR 33 km (20 mi) E of here earthquakes near Luquillo Municipio
Naguabo Municipio, PR 39 km (24 mi) ENE of here earthquakes near Naguabo Municipio

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

Aftershocks so far

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

  1. 2.3 6 km S of Punta Santiago, Puerto Rico
  2. 2.6 Puerto Rico region
  3. 3.2 37 km NNW of Charlotte Amalie, U.S. Virgin Islands
  4. 3.0 Puerto Rico region
  5. 3.9 18 km SE of Culebra, Puerto Rico
  6. 2.7 37 km SSW of Charlotte Amalie, U.S. Virgin Islands
  7. 2.7 5 km SSE of Esperanza, Puerto Rico
  8. 2.9 23 km NNE of Luquillo, Puerto Rico
  9. 3.2 2 km N of Charlotte Amalie, U.S. Virgin Islands
  10. 3.2 34 km NNW of Culebra, Puerto Rico
  11. 3.2 1 km NE of Bajandas, Puerto Rico
  12. 3.4 33 km NNW of Culebra, Puerto Rico
  13. 3.4 1 km W of Punta Santiago, Puerto Rico
  14. 2.6 25 km NNW of Charlotte Amalie, U.S. Virgin Islands
  15. 3.0 33 km SSW 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.

For this area

The largest earthquake within 50 km in our catalogue was M 4.8 on 2021-10-08 — it released about 810 times the energy of this one.

From the QuakeIndex catalogue, built from the USGS FDSN event service.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.