QuakeIndex

Earthquake · reviewed by a seismologist

M 3.4md

20 km SSW of Saint Croix, U.S. Virgin Islands

· 121 km deep · released about 2.2 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Vieques Municipio 88 kmCulebra Municipio 98 kmCeiba Municipio 112 kmHumacao Municipio 118 kmNaguabo Municipio 119 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
121 km below the surface
Felt
1 report · strongest reported intensity I
Nearest
Vieques Municipio, 88 km NW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 313 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 1 person has reported feeling it to USGS.

How big was it?

This earthquake released about 2.2 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 78,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 3,500× 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 2.2 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 4.6× 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 17.5693, -64.8383. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Vieques Municipio, PR 88 km (55 mi) SE of here earthquakes near Vieques Municipio
Culebra Municipio, PR 98 km (61 mi) SSE of here earthquakes near Culebra Municipio
Ceiba Municipio, PR 112 km (70 mi) SE of here earthquakes near Ceiba Municipio
Humacao Municipio, PR 118 km (74 mi) ESE of here earthquakes near Humacao Municipio
Naguabo Municipio, PR 119 km (74 mi) SE of here earthquakes near Naguabo Municipio
Fajardo Municipio, PR 121 km (75 mi) SE of here earthquakes near Fajardo Municipio

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

Aftershocks so far

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

  1. 3.2 40 km SE of Esperanza, Puerto Rico
  2. 3.6 33 km NNW of Saint Croix, U.S. Virgin Islands
  3. 3.2 54 km WSW of Saint Croix, U.S. Virgin Islands
  4. 3.1 30 km SSE of Saint Croix, U.S. Virgin Islands
  5. 3.1 18 km NW of Saint Croix, U.S. Virgin Islands
  6. 3.1 7 km S of Saint Croix, U.S. Virgin Islands
  7. 2.8 41 km SE of Esperanza, Puerto Rico
  8. 2.7 22 km NNE of Christiansted, U.S. Virgin Islands
  9. 3.4 38 km SSW of Saint Croix, U.S. Virgin Islands
  10. 3.1 36 km SSW of Saint Croix, 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.