QuakeIndex

Earthquake · reviewed by a seismologist

M 3.1Md

26 km N of Cruz Bay, U.S. Virgin Islands

· 15 km deep · released about 1,300 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Culebra Municipio 60 kmVieques Municipio 83 kmFajardo Municipio 85 kmCeiba Municipio 93 kmLuquillo Municipio 98 kmNaguabo Municipio 106 kmRío Grande Municipio 107 kmHumacao Municipio 114 kmCanóvanas Municipio 117 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
15 km below the surface
Felt
no reports yet
Nearest
Culebra Municipio, 60 km WSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3508 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 1,300 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.1 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 250,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 11,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 7,900× the energy of this one
  4. This earthquake M 3.1 about 1,300 lb of TNT
  5. Around the size people start to feel M 3.0 this one released 1.4× 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 18.5669, -64.8021. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Culebra Municipio, PR 60 km (37 mi) ENE of here earthquakes near Culebra Municipio
Vieques Municipio, PR 83 km (51 mi) NE of here earthquakes near Vieques Municipio
Fajardo Municipio, PR 85 km (53 mi) ENE of here earthquakes near Fajardo Municipio
Ceiba Municipio, PR 93 km (58 mi) ENE of here earthquakes near Ceiba Municipio
Luquillo Municipio, PR 98 km (61 mi) ENE of here earthquakes near Luquillo Municipio
Naguabo Municipio, PR 106 km (66 mi) ENE of here earthquakes near Naguabo Municipio

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

Aftershocks so far

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

  1. 2.8 66 km N of Charlotte Amalie, U.S. Virgin Islands
  2. 2.9 39 km NNW of Charlotte Amalie, U.S. Virgin Islands
  3. 3.3 45 km NNW of Charlotte Amalie, U.S. Virgin Islands
  4. 3.1 5 km WNW of Charlotte Amalie, U.S. Virgin Islands
  5. 3.1 34 km NNE of Culebra, Puerto Rico
  6. 3.1 51 km NE of Cruz Bay, U.S. Virgin Islands
  7. 3.3 16 km SSW of Charlotte Amalie, U.S. Virgin Islands
  8. 3.3 39 km NNE of Culebra, Puerto Rico
  9. 3.2 37 km NNE of Culebra, Puerto Rico
  10. 3.2 5 km W of Cruz Bay, U.S. Virgin Islands
  11. 2.8 21 km E of Cruz Bay, U.S. Virgin Islands
  12. 3.1 46 km N of Culebra, Puerto Rico
  13. 3.3 51 km NNE of Cruz Bay, U.S. Virgin Islands
  14. 2.9 31 km N of Cruz Bay, U.S. Virgin Islands
  15. 3.1 59 km NNE of Cruz Bay, 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.