QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8md

7 km SE of Culebra, Puerto Rico

· 110 km deep · released about 16 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Culebra Municipio 10 kmVieques Municipio 23 kmFajardo Municipio 38 kmCeiba Municipio 38 kmLuquillo Municipio 50 kmNaguabo Municipio 51 kmHumacao Municipio 57 kmRío Grande Municipio 59 kmLas Piedras Municipio 65 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 1.8 (md)
Depth
110 km below the surface
Felt
no reports yet
Nearest
Culebra Municipio, 10 km NNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3329 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 16 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 970,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 680,000× the energy of this one
  3. Around the size people start to feel M 3.0 61× the energy of this one
  4. This earthquake M 1.8 about 16 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 18.2466, -65.2571. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Culebra Municipio, PR 10 km (6 mi) SSE of here earthquakes near Culebra Municipio
Vieques Municipio, PR 23 km (14 mi) NE of here earthquakes near Vieques Municipio
Fajardo Municipio, PR 38 km (24 mi) ESE of here earthquakes near Fajardo Municipio
Ceiba Municipio, PR 38 km (24 mi) E of here earthquakes near Ceiba Municipio
Luquillo Municipio, PR 50 km (31 mi) ESE of here earthquakes near Luquillo Municipio
Naguabo Municipio, PR 51 km (32 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

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

  1. 2.9 8 km SE of Culebra, Puerto Rico
  2. 3.2 26 km NW of Culebra, Puerto Rico
  3. 3.1 36 km NW of Saint Croix, U.S. Virgin Islands
  4. 3.2 7 km WSW of Charlotte Amalie, U.S. Virgin Islands
  5. 3.1 6 km S of Esperanza, Puerto Rico
  6. 2.9 1 km S of Esperanza, Puerto Rico
  7. 3.1 35 km N of Culebra, Puerto Rico
  8. 3.2 10 km NNE of Charlotte Amalie, U.S. Virgin Islands
  9. 3.3 12 km S of Charlotte Amalie, U.S. Virgin Islands
  10. 3.0 20 km NNW of Culebra, Puerto Rico
  11. 2.7 13 km W of Esperanza, Puerto Rico
  12. 3.3 31 km NW of Charlotte Amalie, U.S. Virgin Islands
  13. 3.1 4 km W of Esperanza, Puerto Rico
  14. 2.9 21 km SSW of Cruz Bay, U.S. Virgin Islands
  15. 3.4 18 km S 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.