QuakeIndex

Earthquake · reviewed by a seismologist

M 3.1md

23 km WNW of Saint Croix, U.S. Virgin Islands

· 30 km deep · released about 1,600 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Vieques Municipio 62 kmCulebra Municipio 67 kmCeiba Municipio 86 kmFajardo Municipio 92 kmNaguabo Municipio 95 kmHumacao Municipio 96 kmLuquillo Municipio 101 kmYabucoa Municipio 101 kmMaunabo Municipio 104 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 3.1 (md)
Depth
30 km below the surface
Felt
no reports yet
Nearest
Vieques Municipio, 62 km WNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 841 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 1,600 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 6.7 210,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 9,400× the energy of this one
  3. Magna, Utah 2020 M 5.7 6,700× the energy of this one
  4. This earthquake M 3.1 about 1,600 lb of TNT
  5. Around the size people start to feel M 3.0 this one released 1.7× 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.

Where

Epicentre 17.8408, -64.9302. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Vieques Municipio, PR 62 km (38 mi) ESE of here earthquakes near Vieques Municipio
Culebra Municipio, PR 67 km (42 mi) SE of here earthquakes near Culebra Municipio
Ceiba Municipio, PR 86 km (54 mi) ESE of here earthquakes near Ceiba Municipio
Fajardo Municipio, PR 92 km (57 mi) SE of here earthquakes near Fajardo Municipio
Naguabo Municipio, PR 95 km (59 mi) ESE of here earthquakes near Naguabo Municipio
Humacao Municipio, PR 96 km (60 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

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

  1. 3.2 54 km WSW of Saint Croix, U.S. Virgin Islands
  2. 3.1 18 km NW of Saint Croix, U.S. Virgin Islands
  3. 2.4 30 km SSW of Charlotte Amalie, U.S. Virgin Islands
  4. 3.1 7 km S of Saint Croix, U.S. Virgin Islands
  5. 2.5 22 km SW of Charlotte Amalie, U.S. Virgin Islands
  6. 3.1 28 km SE of Cruz Bay, U.S. Virgin Islands
  7. 2.8 41 km SE of Esperanza, Puerto Rico
  8. 2.9 23 km S of Charlotte Amalie, U.S. Virgin Islands
  9. 2.9 8 km SW of Charlotte Amalie, U.S. Virgin Islands
  10. 2.7 22 km NNE of Christiansted, U.S. Virgin Islands
  11. 3.0 16 km S of Cruz Bay, U.S. Virgin Islands
  12. 3.1 13 km SSW of Cruz Bay, U.S. Virgin Islands
  13. 3.1 36 km SSW of Saint Croix, U.S. Virgin Islands
  14. 3.4 20 km SSW of Saint Croix, U.S. Virgin Islands
  15. 2.7 27 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.

For this area

The largest earthquake within 50 km in our catalogue was M 4.0 on 2023-10-24 — it released about 19 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.