QuakeIndex

Earthquake · reviewed by a seismologist

M 2.9md

33 km NW of Saint Croix, U.S. Virgin Islands

· 11 km deep · released about 630 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Vieques Municipio 53 kmCulebra Municipio 56 kmCeiba Municipio 77 kmFajardo Municipio 82 kmNaguabo Municipio 86 kmHumacao Municipio 89 kmLuquillo Municipio 91 kmYabucoa Municipio 95 kmMaunabo Municipio 98 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
11 km below the surface
Felt
no reports yet
Nearest
Vieques Municipio, 53 km WNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1214 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 630 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 24,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 17,000× the energy of this one
  3. Around the size people start to feel M 3.0 1.5× the energy of this one
  4. This earthquake M 2.9 about 630 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 17.9388, -64.9727. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Vieques Municipio, PR 53 km (33 mi) ESE of here earthquakes near Vieques Municipio
Culebra Municipio, PR 56 km (35 mi) SE of here earthquakes near Culebra Municipio
Ceiba Municipio, PR 77 km (48 mi) ESE of here earthquakes near Ceiba Municipio
Fajardo Municipio, PR 82 km (51 mi) SE of here earthquakes near Fajardo Municipio
Naguabo Municipio, PR 86 km (54 mi) ESE of here earthquakes near Naguabo Municipio
Humacao Municipio, PR 89 km (55 mi) ESE of here earthquakes near Humacao Municipio

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

Aftershocks so far

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

  1. 2.7 27 km S of Charlotte Amalie, U.S. Virgin Islands
  2. 3.3 31 km SSE of Esperanza, Puerto Rico
  3. 3.4 22 km SSW of Cruz Bay, U.S. Virgin Islands
  4. 3.4 15 km ESE of Cruz Bay, U.S. Virgin Islands
  5. 3.2 32 km SE of Esperanza, Puerto Rico
  6. 3.1 23 km SE of Culebra, Puerto Rico
  7. 3.1 18 km S of Cruz Bay, U.S. Virgin Islands
  8. 3.2 24 km SSE of Cruz Bay, U.S. Virgin Islands
  9. 3.0 7 km SE of Esperanza, Puerto Rico
  10. 2.5 10 km SE of Esperanza, Puerto Rico
  11. 2.7 33 km SSE of Esperanza, Puerto Rico
  12. 3.3 22 km SSW of Charlotte Amalie, U.S. Virgin Islands
  13. 3.1 16 km SW of Charlotte Amalie, U.S. Virgin Islands
  14. 3.0 6 km E of Esperanza, Puerto Rico
  15. 3.1 22 km NNE of Christiansted, 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 760 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.