QuakeIndex

Earthquake · reviewed by a seismologist

M 4.1md

49 km N of Charlotte Amalie, U.S. Virgin Islands

· 19 km deep · released about 19 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Culebra Municipio 65 kmFajardo Municipio 83 kmVieques Municipio 91 kmCeiba Municipio 95 kmLuquillo Municipio 95 kmRío Grande Municipio 103 kmNaguabo Municipio 107 kmCanóvanas Municipio 114 kmLoíza Municipio 114 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 4.1 (md)
Depth
19 km below the surface
Felt
10 reports · strongest reported intensity III
Nearest
Culebra Municipio, 65 km SW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 43 days ago

This was a light earthquake. It is usually felt clearly nearby and can rattle windows and dishes, but damage is uncommon. 10 people have reported feeling it to USGS.

How big was it?

This earthquake released about 19 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 5.1 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 8,800× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 390× the energy of this one
  3. Magna, Utah 2020 M 5.7 280× the energy of this one
  4. This earthquake M 4.1 about 19 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 40× 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 18.7861, -64.9225. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Culebra Municipio, PR 65 km (41 mi) NE of here earthquakes near Culebra Municipio
Fajardo Municipio, PR 83 km (52 mi) ENE of here earthquakes near Fajardo Municipio
Vieques Municipio, PR 91 km (57 mi) NE of here earthquakes near Vieques Municipio
Ceiba Municipio, PR 95 km (59 mi) NE of here earthquakes near Ceiba Municipio
Luquillo Municipio, PR 95 km (59 mi) ENE of here earthquakes near Luquillo Municipio
Río Grande Municipio, PR 103 km (64 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

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

  1. 2.9 73 km N of Culebra, Puerto Rico
  2. 3.0 58 km N of Culebra, Puerto Rico
  3. 3.0 62 km NNE of Cruz Bay, U.S. Virgin Islands
  4. 3.5 59 km N of Culebra, Puerto Rico
  5. 3.6 74 km NNE of Cruz Bay, U.S. Virgin Islands
  6. 3.5 72 km NNE of Cruz Bay, U.S. Virgin Islands
  7. 3.5 65 km N of Charlotte Amalie, U.S. Virgin Islands
  8. 2.9 55 km N of Charlotte Amalie, U.S. Virgin Islands
  9. 3.1 71 km NNE of Cruz Bay, U.S. Virgin Islands
  10. 3.0 56 km N of Charlotte Amalie, U.S. Virgin Islands
  11. 3.0 38 km N of Charlotte Amalie, U.S. Virgin Islands
  12. 3.2 89 km N of Cruz Bay, U.S. Virgin Islands
  13. 3.3 96 km N of Cruz Bay, U.S. Virgin Islands
  14. 3.3 54 km N of Charlotte Amalie, U.S. Virgin Islands
  15. 2.9 9 km NE of Charlotte Amalie, 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 5.0 on 2021-02-06 — it released about 24 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.