QuakeIndex

Earthquake · reviewed by a seismologist

M 3.1md

23 km SSW of Cruz Bay, U.S. Virgin Islands

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

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Culebra Municipio 52 kmVieques Municipio 60 kmCeiba Municipio 81 kmFajardo Municipio 82 kmNaguabo Municipio 93 kmLuquillo Municipio 93 kmHumacao Municipio 97 kmRío Grande Municipio 102 kmYabucoa Municipio 106 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
152 km below the surface
Felt
no reports yet
Nearest
Culebra Municipio, 52 km WNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2550 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 18.1268, -64.8641. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Culebra Municipio, PR 52 km (32 mi) ESE of here earthquakes near Culebra Municipio
Vieques Municipio, PR 60 km (37 mi) E of here earthquakes near Vieques Municipio
Ceiba Municipio, PR 81 km (50 mi) E of here earthquakes near Ceiba Municipio
Fajardo Municipio, PR 82 km (51 mi) ESE of here earthquakes near Fajardo Municipio
Naguabo Municipio, PR 93 km (58 mi) E of here earthquakes near Naguabo Municipio
Luquillo Municipio, PR 93 km (58 mi) ESE of here earthquakes near Luquillo Municipio

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

Aftershocks so far

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

  1. 3.2 21 km S of Charlotte Amalie, U.S. Virgin Islands
  2. 3.4 8 km SW of Charlotte Amalie, U.S. Virgin Islands
  3. 3.5 25 km NNE of Charlotte Amalie, U.S. Virgin Islands
  4. 3.8 19 km NNW of Charlotte Amalie, U.S. Virgin Islands
  5. 3.5 36 km W of Saint Croix, U.S. Virgin Islands
  6. 3.5 18 km NE of Culebra, Puerto Rico
  7. 3.6 34 km SSE of Cruz Bay, U.S. Virgin Islands
  8. 4.0 31 km E of Cruz Bay, U.S. Virgin Islands
  9. 3.7 13 km SSW of Cruz Bay, U.S. Virgin Islands
  10. 3.8 11 km SW of Charlotte Amalie, U.S. Virgin Islands
  11. 3.6 Virgin Islands
  12. 3.6 32 km S of Cruz Bay, U.S. Virgin Islands
  13. 3.5 35 km NNW of Saint Croix, U.S. Virgin Islands
  14. 3.4 35 km SSW of Charlotte Amalie, U.S. Virgin Islands
  15. 3.8 13 km NW 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.