QuakeIndex

Earthquake · reviewed by a seismologist

M 3.1md

12 km E of Culebra, Puerto Rico

· 136 km deep · released about 1,600 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Culebra Municipio 13 kmVieques Municipio 33 kmFajardo Municipio 44 kmCeiba Municipio 47 kmLuquillo Municipio 56 kmNaguabo Municipio 59 kmRío Grande Municipio 66 kmHumacao Municipio 66 kmLas Piedras Municipio 74 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 3.1 (md)
Depth
136 km below the surface
Felt
no reports yet
Nearest
Culebra Municipio, 13 km WNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2668 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 1,600 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.2 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 210,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 9,400× the energy of this one
  3. Magna, Utah 2020 M 5.7 6,700× the energy of this one
  4. This earthquake M 3.1 about 1,600 lb of TNT
  5. Around the size people start to feel M 3.0 this one released 1.7× 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 18.3028, -65.1826. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Culebra Municipio, PR 13 km (8 mi) ESE of here earthquakes near Culebra Municipio
Vieques Municipio, PR 33 km (20 mi) NE of here earthquakes near Vieques Municipio
Fajardo Municipio, PR 44 km (27 mi) ESE of here earthquakes near Fajardo Municipio
Ceiba Municipio, PR 47 km (29 mi) E of here earthquakes near Ceiba Municipio
Luquillo Municipio, PR 56 km (35 mi) E of here earthquakes near Luquillo Municipio
Naguabo Municipio, PR 59 km (37 mi) E of here earthquakes near Naguabo Municipio

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

Aftershocks so far

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

  1. 4.2 18 km NNW of Charlotte Amalie, U.S. Virgin Islands
  2. 2.7 28 km NE of Luquillo, Puerto Rico
  3. 2.6 11 km SE of Isabel Segunda, Puerto Rico
  4. 2.7 31 km SE of Esperanza, Puerto Rico
  5. 2.7 18 km SSE of Esperanza, Puerto Rico
  6. 3.1 23 km SSW of Cruz Bay, U.S. Virgin Islands
  7. 2.7 49 km N of Culebra, Puerto Rico
  8. 2.0 29 km NNW of Charlotte Amalie, U.S. Virgin Islands
  9. 2.5 26 km SE of Esperanza, Puerto Rico
  10. 2.9 10 km SSE of Esperanza, Puerto Rico
  11. 2.7 3 km E of Ceiba, Puerto Rico
  12. 2.4 45 km NNW of Charlotte Amalie, U.S. Virgin Islands
  13. 2.2 33 km S of Charlotte Amalie, U.S. Virgin Islands
  14. 2.2 Virgin Islands
  15. 2.2 18 km SSW 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.