QuakeIndex

Earthquake · reviewed by a seismologist

M 3.4md

18 km S of Charlotte Amalie, U.S. Virgin Islands

· 138 km deep · released about 2.1 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Culebra Municipio 40 kmVieques Municipio 50 kmCeiba Municipio 70 kmFajardo Municipio 70 kmLuquillo Municipio 82 kmNaguabo Municipio 82 kmHumacao Municipio 87 kmRío Grande Municipio 91 kmYabucoa Municipio 96 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 3.4 (md)
Depth
138 km below the surface
Felt
no reports yet
Nearest
Culebra Municipio, 40 km WNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3069 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 2.1 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.4 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 80,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 3,600× the energy of this one
  3. Magna, Utah 2020 M 5.7 2,500× the energy of this one
  4. This earthquake M 3.4 about 2.1 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 4.4× 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 18.1773, -64.9646. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Culebra Municipio, PR 40 km (25 mi) ESE of here earthquakes near Culebra Municipio
Vieques Municipio, PR 50 km (31 mi) E of here earthquakes near Vieques Municipio
Ceiba Municipio, PR 70 km (43 mi) E of here earthquakes near Ceiba Municipio
Fajardo Municipio, PR 70 km (43 mi) ESE of here earthquakes near Fajardo Municipio
Luquillo Municipio, PR 82 km (51 mi) ESE of here earthquakes near Luquillo Municipio
Naguabo Municipio, PR 82 km (51 mi) E of here earthquakes near Naguabo 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. 2.3 18 km SSW of Cruz Bay, U.S. Virgin Islands
  2. 2.6 17 km N of Charlotte Amalie, U.S. Virgin Islands
  3. 1.9 17 km SE of Esperanza, Puerto Rico
  4. 2.9 41 km ESE of Esperanza, Puerto Rico
  5. 2.2 19 km NW of Charlotte Amalie, U.S. Virgin Islands
  6. 2.3 39 km ESE of Esperanza, Puerto Rico
  7. 3.4 2 km ENE of Cruz Bay, U.S. Virgin Islands
  8. 2.5 4 km SSE of Cruz Bay, U.S. Virgin Islands
  9. 2.5 21 km W of Saint Croix, U.S. Virgin Islands
  10. 2.8 26 km S of Charlotte Amalie, U.S. Virgin Islands
  11. 2.5 29 km S of Charlotte Amalie, U.S. Virgin Islands
  12. 2.9 36 km ESE of Isabel Segunda, Puerto Rico
  13. 2.2 29 km NW of Charlotte Amalie, U.S. Virgin Islands
  14. 2.5 12 km N of Charlotte Amalie, U.S. Virgin Islands
  15. 2.8 31 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.

On USGS

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