QuakeIndex

Earthquake · reviewed by a seismologist

M 3.1md

94 km NNE of Luquillo, Puerto Rico

· 23 km deep · released about 1,200 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Fajardo Municipio 88 kmCulebra Municipio 92 kmLuquillo Municipio 95 kmRío Grande Municipio 98 kmLoíza Municipio 100 kmCeiba Municipio 104 kmCarolina Municipio 106 kmCanóvanas Municipio 107 kmSan Juan Municipio 110 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
no reports yet
Nearest
Fajardo Municipio, 88 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3374 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 1,200 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 6.7 290,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 13,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 9,100× the energy of this one
  4. This earthquake M 3.1 about 1,200 lb of TNT
  5. Around the size people start to feel M 3.0 this one released 1.2× 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 19.1513, -65.3591. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Fajardo Municipio, PR 88 km (55 mi) NNE of here earthquakes near Fajardo Municipio
Culebra Municipio, PR 92 km (57 mi) N of here earthquakes near Culebra Municipio
Luquillo Municipio, PR 95 km (59 mi) NNE of here earthquakes near Luquillo Municipio
Río Grande Municipio, PR 98 km (61 mi) NNE of here earthquakes near Río Grande Municipio
Loíza Municipio, PR 100 km (62 mi) NE of here earthquakes near Loíza Municipio
Ceiba Municipio, PR 104 km (64 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

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

  1. 2.1 76 km NNW of Charlotte Amalie, U.S. Virgin Islands
  2. 2.3 51 km NNW of Culebra, Puerto Rico
  3. 3.0 65 km N of Charlotte Amalie, U.S. Virgin Islands
  4. 3.0 63 km N of Charlotte Amalie, U.S. Virgin Islands
  5. 2.3 78 km NNE of Vieques, Puerto Rico
  6. 2.4 56 km NNE of Luquillo, Puerto Rico
  7. 2.8 56 km NNE of Luquillo, Puerto Rico
  8. 2.1 53 km NNE of Luquillo, Puerto Rico
  9. 2.6 55 km NNE of Luquillo, Puerto Rico
  10. 2.4 Puerto Rico region
  11. 2.3 66 km NNW of Charlotte Amalie, U.S. Virgin Islands
  12. 2.1 75 km N of Culebra, Puerto Rico
  13. 2.0 66 km NNW of Charlotte Amalie, U.S. Virgin Islands
  14. 2.5 100 km N of Suárez, Puerto Rico
  15. 1.9 68 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 72 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.