QuakeIndex

Earthquake · reviewed by a seismologist

M 3.1Md

100 km N of Culebra, Puerto Rico

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

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Culebra Municipio 98 kmFajardo Municipio 98 kmLuquillo Municipio 106 kmRío Grande Municipio 110 kmLoíza Municipio 113 kmCeiba Municipio 113 kmCarolina Municipio 119 kmCanóvanas Municipio 119 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
33 km below the surface
Felt
no reports yet
Nearest
Culebra Municipio, 98 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3466 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 1,300 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 19.2040, -65.2295. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Culebra Municipio, PR 98 km (61 mi) N of here earthquakes near Culebra Municipio
Fajardo Municipio, PR 98 km (61 mi) NNE of here earthquakes near Fajardo Municipio
Luquillo Municipio, PR 106 km (66 mi) NNE of here earthquakes near Luquillo Municipio
Río Grande Municipio, PR 110 km (68 mi) NNE of here earthquakes near Río Grande Municipio
Loíza Municipio, PR 113 km (70 mi) NE of here earthquakes near Loíza Municipio
Ceiba Municipio, PR 113 km (71 mi) NNE of here earthquakes near Ceiba 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. 2.4 81 km N of Charlotte Amalie, U.S. Virgin Islands
  2. 2.6 97 km N of Charlotte Amalie, U.S. Virgin Islands
  3. 2.0 95 km N of Cruz Bay, U.S. Virgin Islands
  4. 2.3 103 km N of Charlotte Amalie, U.S. Virgin Islands
  5. 2.0 56 km N of Charlotte Amalie, U.S. Virgin Islands
  6. 3.4 117 km N of Charlotte Amalie, U.S. Virgin Islands
  7. 2.2 83 km NNE of Luquillo, Puerto Rico
  8. 2.4 93 km N of Culebra, Puerto Rico
  9. 2.6 79 km N of Charlotte Amalie, U.S. Virgin Islands
  10. 2.9 78 km NNE of Suárez, Puerto Rico
  11. 2.9 78 km NNE of Suárez, Puerto Rico
  12. 2.7 77 km NNE of Vieques, Puerto Rico
  13. 3.4 84 km NNE of Vieques, Puerto Rico
  14. 2.2 89 km N of Charlotte Amalie, U.S. Virgin Islands
  15. 3.3 84 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.

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.