QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1Md

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

· 8.0 km deep · released about 43 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Culebra Municipio 81 kmFajardo Municipio 102 kmVieques Municipio 106 kmCeiba Municipio 112 kmLuquillo Municipio 115 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 2.1 (Md)
Depth
8.0 km below the surface
Felt
no reports yet
Nearest
Culebra Municipio, 81 km SW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3617 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

How big was it?

This earthquake released about 43 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.1 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 350,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 250,000× the energy of this one
  3. Around the size people start to feel M 3.0 22× the energy of this one
  4. This earthquake M 2.1 about 43 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 18.7910, -64.7170. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Culebra Municipio, PR 81 km (50 mi) NE of here earthquakes near Culebra Municipio
Fajardo Municipio, PR 102 km (64 mi) ENE of here earthquakes near Fajardo Municipio
Vieques Municipio, PR 106 km (66 mi) NE of here earthquakes near Vieques Municipio
Ceiba Municipio, PR 112 km (70 mi) ENE of here earthquakes near Ceiba Municipio
Luquillo Municipio, PR 115 km (71 mi) ENE of here earthquakes near Luquillo Municipio
Río Grande Municipio, PR 123 km (76 mi) ENE of here earthquakes near Río Grande Municipio

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

Aftershocks so far

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

  1. 2.5 93 km N of Cruz Bay, U.S. Virgin Islands
  2. 2.9 77 km N of Cruz Bay, U.S. Virgin Islands
  3. 2.0 90 km N of Cruz Bay, U.S. Virgin Islands
  4. 2.3 82 km N of Cruz Bay, U.S. Virgin Islands
  5. 2.5 89 km N of Cruz Bay, U.S. Virgin Islands
  6. 2.2 99 km NNE of Cruz Bay, U.S. Virgin Islands
  7. 2.4 65 km NE of Cruz Bay, U.S. Virgin Islands
  8. 2.3 40 km ENE of Cruz Bay, U.S. Virgin Islands
  9. 2.2 41 km NNW of Charlotte Amalie, U.S. Virgin Islands
  10. 1.8 Virgin Islands
  11. 2.3 50 km NNE of Cruz Bay, U.S. Virgin Islands
  12. 3.0 68 km NNW of Charlotte Amalie, U.S. Virgin Islands
  13. 2.0 75 km N of Charlotte Amalie, U.S. Virgin Islands
  14. 2.6 68 km N of Charlotte Amalie, U.S. Virgin Islands
  15. 2.4 88 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.

For this area

The largest earthquake within 50 km in our catalogue was M 4.0 on 2016-06-29 — it released about 710 times the energy of this one.

From the QuakeIndex catalogue, built from the USGS FDSN event service.

On USGS

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