QuakeIndex

Earthquake · reviewed by a seismologist

M 3.4md

35 km SSW of Charlotte Amalie, U.S. Virgin Islands

· 44 km deep · released about 2.1 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Vieques Municipio 45 kmCulebra Municipio 45 kmCeiba Municipio 68 kmFajardo Municipio 72 kmNaguabo Municipio 78 kmHumacao Municipio 82 kmLuquillo Municipio 82 kmYabucoa Municipio 89 kmRío Grande Municipio 91 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
44 km below the surface
Felt
no reports yet
Nearest
Vieques Municipio, 45 km WNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2227 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 18.0288, -65.0200. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Vieques Municipio, PR 45 km (28 mi) ESE of here earthquakes near Vieques Municipio
Culebra Municipio, PR 45 km (28 mi) SE of here earthquakes near Culebra Municipio
Ceiba Municipio, PR 68 km (42 mi) ESE of here earthquakes near Ceiba Municipio
Fajardo Municipio, PR 72 km (45 mi) ESE of here earthquakes near Fajardo Municipio
Naguabo Municipio, PR 78 km (49 mi) ESE of here earthquakes near Naguabo Municipio
Humacao Municipio, PR 82 km (51 mi) E of here earthquakes near Humacao Municipio

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

Aftershocks so far

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

  1. 3.1 9 km SE of Esperanza, Puerto Rico
  2. 2.8 8 km NE of Cruz Bay, U.S. Virgin Islands
  3. 3.0 21 km W of Saint Croix, U.S. Virgin Islands
  4. 2.6 36 km SSW of Charlotte Amalie, U.S. Virgin Islands
  5. 2.5 35 km SSW of Charlotte Amalie, U.S. Virgin Islands
  6. 3.1 10 km E of Culebra, Puerto Rico
  7. 3.3 Virgin Islands
  8. 2.9 13 km SE of Esperanza, Puerto Rico
  9. 3.0 26 km SSE of Cruz Bay, U.S. Virgin Islands
  10. 2.8 17 km SSE of Esperanza, Puerto Rico
  11. 2.9 28 km SSW of Charlotte Amalie, U.S. Virgin Islands
  12. 3.7 27 km S of Charlotte Amalie, U.S. Virgin Islands
  13. 3.1 21 km WNW of Charlotte Amalie, U.S. Virgin Islands
  14. 3.0 10 km NNW of Cruz Bay, U.S. Virgin Islands
  15. 3.1 9 km WSW of Culebra, Puerto Rico

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.