QuakeIndex

Earthquake · reviewed by a seismologist

M 3.1Md

46 km N of Culebra, Puerto Rico

· 23 km deep · released about 1,300 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Culebra Municipio 45 kmFajardo Municipio 53 kmLuquillo Municipio 64 kmCeiba Municipio 66 kmVieques Municipio 70 kmRío Grande Municipio 71 kmNaguabo Municipio 78 kmLoíza Municipio 81 kmCanóvanas Municipio 82 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
23 km below the surface
Felt
1 report · strongest reported intensity II
Nearest
Culebra Municipio, 45 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3394 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 1 person has reported feeling it to USGS.

How big was it?

This earthquake released about 1,300 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.1 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 250,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 11,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 7,900× the energy of this one
  4. This earthquake M 3.1 about 1,300 lb of TNT
  5. Around the size people start to feel M 3.0 this one released 1.4× 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 18.7217, -65.2291. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Culebra Municipio, PR 45 km (28 mi) N of here earthquakes near Culebra Municipio
Fajardo Municipio, PR 53 km (33 mi) NE of here earthquakes near Fajardo Municipio
Luquillo Municipio, PR 64 km (40 mi) NE of here earthquakes near Luquillo Municipio
Ceiba Municipio, PR 66 km (41 mi) NE of here earthquakes near Ceiba Municipio
Vieques Municipio, PR 70 km (43 mi) NNE of here earthquakes near Vieques Municipio
Río Grande Municipio, PR 71 km (44 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

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

  1. 3.0 22 km NW of Charlotte Amalie, U.S. Virgin Islands
  2. 2.1 67 km N of Culebra, Puerto Rico
  3. 1.5 21 km NNW of Cruz Bay, U.S. Virgin Islands
  4. 1.6 66 km N of Charlotte Amalie, U.S. Virgin Islands
  5. 2.1 48 km NNW of Charlotte Amalie, U.S. Virgin Islands
  6. 3.2 85 km N of Culebra, Puerto Rico
  7. 2.8 66 km N of Charlotte Amalie, U.S. Virgin Islands
  8. 3.1 83 km NNW of Charlotte Amalie, U.S. Virgin Islands
  9. 2.8 64 km NNE of Luquillo, Puerto Rico
  10. 2.4 35 km NE of Luquillo, Puerto Rico
  11. 2.2 70 km N of Charlotte Amalie, U.S. Virgin Islands
  12. 2.9 39 km NNW of Charlotte Amalie, U.S. Virgin Islands
  13. 2.4 71 km N of Charlotte Amalie, U.S. Virgin Islands
  14. 2.7 39 km NNE of Luquillo, Puerto Rico
  15. 2.7 90 km NNW 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.

For this area

The largest earthquake within 50 km in our catalogue was M 4.3 on 2016-09-04 — it released about 63 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.