QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1Md

55 km N of Culebra, Puerto Rico

· 4.0 km deep · released about 43 lb of TNT

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10 km30 km60 km120 km N Culebra Municipio 53 kmFajardo Municipio 58 kmLuquillo Municipio 68 kmCeiba Municipio 72 kmRío Grande Municipio 74 kmVieques Municipio 78 kmLoíza Municipio 82 kmNaguabo Municipio 83 kmCanóvanas Municipio 85 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
4.0 km below the surface
Felt
no reports yet
Nearest
Culebra Municipio, 53 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3712 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 18.8027, -65.2565. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Culebra Municipio, PR 53 km (33 mi) N of here earthquakes near Culebra Municipio
Fajardo Municipio, PR 58 km (36 mi) NE of here earthquakes near Fajardo Municipio
Luquillo Municipio, PR 68 km (42 mi) NE of here earthquakes near Luquillo Municipio
Ceiba Municipio, PR 72 km (45 mi) NNE of here earthquakes near Ceiba Municipio
Río Grande Municipio, PR 74 km (46 mi) NE of here earthquakes near Río Grande Municipio
Vieques Municipio, PR 78 km (48 mi) NNE of here earthquakes near Vieques Municipio

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

Aftershocks so far

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

  1. 2.2 72 km N of Charlotte Amalie, U.S. Virgin Islands
  2. 2.1 59 km NNW of Charlotte Amalie, U.S. Virgin Islands
  3. 2.2 60 km NNW of Charlotte Amalie, U.S. Virgin Islands
  4. 2.3 59 km NNW of Charlotte Amalie, U.S. Virgin Islands
  5. 2.3 77 km N of Culebra, Puerto Rico
  6. 2.4 70 km N of Charlotte Amalie, U.S. Virgin Islands
  7. 2.6 82 km N of Charlotte Amalie, U.S. Virgin Islands
  8. 2.2 48 km NNW of Charlotte Amalie, U.S. Virgin Islands
  9. 1.9 52 km N of Charlotte Amalie, U.S. Virgin Islands
  10. 3.0 74 km N of Charlotte Amalie, U.S. Virgin Islands
  11. 2.1 51 km NNW of Charlotte Amalie, U.S. Virgin Islands
  12. 2.2 56 km N of Charlotte Amalie, U.S. Virgin Islands
  13. 2.3 52 km N of Charlotte Amalie, U.S. Virgin Islands
  14. 1.5 57 km N of Charlotte Amalie, U.S. Virgin Islands
  15. 2.1 61 km N 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.

On USGS

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