QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1Md

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

· 46 km deep · released about 43 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Culebra 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 2.1 (Md)
Depth
46 km below the surface
Felt
no reports yet
Nearest
Culebra Municipio, 118 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3776 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 19.2290, -64.7125. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Culebra Municipio, PR 118 km (74 mi) NNE of here earthquakes near Culebra Municipio
Fajardo Municipio, PR 131 km (82 mi) NE of here earthquakes near Fajardo Municipio
Luquillo Municipio, PR 142 km (88 mi) NE of here earthquakes near Luquillo Municipio
Ceiba Municipio, PR 145 km (90 mi) NE of here earthquakes near Ceiba Municipio
Río Grande Municipio, PR 149 km (92 mi) NE of here earthquakes near Río Grande Municipio
Naguabo Municipio, PR 156 km (97 mi) NE of here earthquakes near Naguabo Municipio

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

Aftershocks so far

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

  1. 3.2 113 km N of Charlotte Amalie, U.S. Virgin Islands
  2. 3.0 107 km NNE of Cruz Bay, U.S. Virgin Islands
  3. 3.0 104 km N of Charlotte Amalie, U.S. Virgin Islands
  4. 2.2 74 km NNE of Cruz Bay, U.S. Virgin Islands
  5. 2.3 60 km NNE of Cruz Bay, U.S. Virgin Islands
  6. 2.3 68 km NNE of Cruz Bay, U.S. Virgin Islands
  7. 2.6 69 km N of Charlotte Amalie, U.S. Virgin Islands
  8. 2.3 71 km N of Charlotte Amalie, U.S. Virgin Islands
  9. 2.3 62 km N of Charlotte Amalie, U.S. Virgin Islands
  10. 3.2 79 km NNE of Cruz Bay, U.S. Virgin Islands
  11. 2.8 62 km N of Charlotte Amalie, U.S. Virgin Islands
  12. 2.1 78 km NNE of Cruz Bay, U.S. Virgin Islands
  13. 2.5 56 km NNE of Cruz Bay, U.S. Virgin Islands
  14. 1.8 76 km NNW of Charlotte Amalie, U.S. Virgin Islands
  15. 2.6 105 km N 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.