QuakeIndex

Earthquake · reviewed by a seismologist

M 3.6md

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

· 41 km deep · released about 4.1 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Culebra Municipio 78 kmFajardo Municipio 93 kmVieques Municipio 104 kmLuquillo Municipio 105 kmCeiba Municipio 106 kmRío Grande Municipio 112 kmNaguabo Municipio 118 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 3.6 (md)
Depth
41 km below the surface
Felt
no reports yet
Nearest
Culebra Municipio, 78 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1715 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 4.1 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.6 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 42,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 1,900× the energy of this one
  3. Magna, Utah 2020 M 5.7 1,300× the energy of this one
  4. This earthquake M 3.6 about 4.1 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 8.5× 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 18.9156, -64.9036. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Culebra Municipio, PR 78 km (49 mi) NNE of here earthquakes near Culebra Municipio
Fajardo Municipio, PR 93 km (58 mi) NE of here earthquakes near Fajardo Municipio
Vieques Municipio, PR 104 km (65 mi) NNE of here earthquakes near Vieques Municipio
Luquillo Municipio, PR 105 km (65 mi) NE of here earthquakes near Luquillo Municipio
Ceiba Municipio, PR 106 km (66 mi) NE of here earthquakes near Ceiba Municipio
Río Grande Municipio, PR 112 km (69 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

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

  1. 3.2 50 km N of Culebra, Puerto Rico
  2. 3.2 73 km NNW of Charlotte Amalie, U.S. Virgin Islands
  3. 3.4 37 km NW of Charlotte Amalie, U.S. Virgin Islands
  4. 3.6 98 km N of Cruz Bay, U.S. Virgin Islands
  5. 4.0 91 km NNE of Cruz Bay, U.S. Virgin Islands
  6. 3.4 50 km NNW of Charlotte Amalie, U.S. Virgin Islands
  7. 3.9 106 km N of Cruz Bay, U.S. Virgin Islands
  8. 4.1 104 km N of Charlotte Amalie, U.S. Virgin Islands
  9. 3.4 67 km N of Culebra, Puerto Rico
  10. 3.0 38 km NNE of Culebra, Puerto Rico
  11. 3.7 105 km NNW of Charlotte Amalie, U.S. Virgin Islands
  12. 3.4 103 km NNW of Charlotte Amalie, U.S. Virgin Islands
  13. 3.5 72 km NNW of Charlotte Amalie, U.S. Virgin Islands
  14. 3.7 99 km N of Charlotte Amalie, U.S. Virgin Islands
  15. 3.6 83 km N of Culebra, Puerto Rico

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 110 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.