QuakeIndex

Earthquake · reviewed by a seismologist

M 2.8md

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

· 27 km deep · released about 510 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Vieques Municipio 90 kmCulebra Municipio 99 kmCeiba Municipio 114 kmHumacao Municipio 119 kmNaguabo Municipio 120 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 2.8 (md)
Depth
27 km below the surface
Felt
no reports yet
Nearest
Vieques Municipio, 90 km NW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1252 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 510 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 30,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 21,000× the energy of this one
  3. Around the size people start to feel M 3.0 1.9× the energy of this one
  4. This earthquake M 2.8 about 510 lb of TNT

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 17.5505, -64.8405. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Vieques Municipio, PR 90 km (56 mi) SE of here earthquakes near Vieques Municipio
Culebra Municipio, PR 99 km (62 mi) SSE of here earthquakes near Culebra Municipio
Ceiba Municipio, PR 114 km (71 mi) SE of here earthquakes near Ceiba Municipio
Humacao Municipio, PR 119 km (74 mi) ESE of here earthquakes near Humacao Municipio
Naguabo Municipio, PR 120 km (74 mi) SE of here earthquakes near Naguabo Municipio
Yabucoa Municipio, PR 122 km (76 mi) ESE of here earthquakes near Yabucoa Municipio

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

Aftershocks so far

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

  1. 3.2 40 km SE of Esperanza, Puerto Rico
  2. 3.2 54 km WSW of Saint Croix, U.S. Virgin Islands
  3. 3.1 30 km SSE of Saint Croix, U.S. Virgin Islands
  4. 3.1 18 km NW of Saint Croix, U.S. Virgin Islands
  5. 3.1 7 km S of Saint Croix, U.S. Virgin Islands
  6. 2.8 41 km SE of Esperanza, Puerto Rico
  7. 2.7 22 km NNE of Christiansted, U.S. Virgin Islands
  8. 3.4 38 km SSW of Saint Croix, U.S. Virgin Islands
  9. 3.1 36 km SSW of Saint Croix, U.S. Virgin Islands
  10. 3.4 20 km SSW of Saint Croix, U.S. Virgin Islands
  11. 3.1 22 km NNE of Christiansted, U.S. Virgin Islands
  12. 3.2 31 km NW of Saint Croix, U.S. Virgin Islands
  13. 3.2 20 km NNW of Christiansted, U.S. Virgin Islands
  14. 3.3 14 km SW of Saint Croix, U.S. Virgin Islands
  15. 3.1 23 km WNW 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.