QuakeIndex

Earthquake · reviewed by a seismologist

M 3.3md

29 km NNE of Luquillo, Puerto Rico

· 76 km deep · released about 1.2 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Fajardo Municipio 23 kmLuquillo Municipio 29 kmRío Grande Municipio 34 kmCeiba Municipio 38 kmCulebra Municipio 41 kmLoíza Municipio 43 kmCanóvanas Municipio 44 kmNaguabo Municipio 46 kmCarolina Municipio 47 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 3.3 (md)
Depth
76 km below the surface
Felt
no reports yet
Nearest
Fajardo Municipio, 23 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3023 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 1.2 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.3 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 140,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 6,500× the energy of this one
  3. Magna, Utah 2020 M 5.7 4,600× the energy of this one
  4. This earthquake M 3.3 about 1.2 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 2.5× 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 18.5946, -65.5701. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Fajardo Municipio, PR 23 km (14 mi) N of here earthquakes near Fajardo Municipio
Luquillo Municipio, PR 29 km (18 mi) NNE of here earthquakes near Luquillo Municipio
Río Grande Municipio, PR 34 km (21 mi) NE of here earthquakes near Río Grande Municipio
Ceiba Municipio, PR 38 km (24 mi) N of here earthquakes near Ceiba Municipio
Culebra Municipio, PR 41 km (25 mi) NW of here earthquakes near Culebra Municipio
Loíza Municipio, PR 43 km (26 mi) ENE of here earthquakes near Loíza Municipio

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

Aftershocks so far

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

  1. 2.6 41 km NNE of Luquillo, Puerto Rico
  2. 2.5 8 km NNW of Isabel Segunda, Puerto Rico
  3. 2.2 29 km NW of Charlotte Amalie, U.S. Virgin Islands
  4. 3.1 57 km N of Culebra, Puerto Rico
  5. 2.0 33 km N of Culebra, Puerto Rico
  6. 2.5 59 km N of Culebra, Puerto Rico
  7. 3.1 57 km N of Culebra, Puerto Rico
  8. 2.4 73 km N of Culebra, Puerto Rico
  9. 3.0 64 km N of Culebra, Puerto Rico
  10. 2.7 33 km NNE of Culebra, Puerto Rico
  11. 2.1 44 km NNE of Luquillo, Puerto Rico
  12. 2.7 35 km NNE of Culebra, Puerto Rico
  13. 2.6 76 km NNE of Luquillo, Puerto Rico
  14. 3.1 68 km NNE of Luquillo, Puerto Rico
  15. 3.1 72 km N of Culebra, Puerto Rico

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.