QuakeIndex

Earthquake · reviewed by a seismologist

M 3.1md

10 km N of Hatillo, Puerto Rico

· 76 km deep · released about 1,500 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Camuy Municipio 16 kmHatillo Municipio 16 kmQuebradillas Municipio 17 kmArecibo Municipio 23 kmIsabela Municipio 23 kmBarceloneta Municipio 31 kmSan Sebastián Municipio 32 kmLares Municipio 35 kmMoca Municipio 36 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
76 km below the surface
Felt
no reports yet
Nearest
Camuy Municipio, 16 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3161 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 1,500 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 6.7 220,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 9,800× the energy of this one
  3. Magna, Utah 2020 M 5.7 6,900× the energy of this one
  4. This earthquake M 3.1 about 1,500 lb of TNT
  5. Around the size people start to feel M 3.0 this one released 1.6× 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 18.5853, -66.8218. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Camuy Municipio, PR 16 km (10 mi) NNE of here earthquakes near Camuy Municipio
Hatillo Municipio, PR 16 km (10 mi) N of here earthquakes near Hatillo Municipio
Quebradillas Municipio, PR 17 km (11 mi) NE of here earthquakes near Quebradillas Municipio
Arecibo Municipio, PR 23 km (14 mi) NW of here earthquakes near Arecibo Municipio
Isabela Municipio, PR 23 km (14 mi) ENE of here earthquakes near Isabela Municipio
Barceloneta Municipio, PR 31 km (19 mi) WNW of here earthquakes near Barceloneta Municipio

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

Aftershocks so far

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

  1. 2.3 Puerto Rico region
  2. 2.3 5 km WNW of Aguada, Puerto Rico
  3. 2.6 47 km N of Garrochales, Puerto Rico
  4. 2.6 19 km NNE of Arecibo, Puerto Rico
  5. 2.8 31 km NNW of San Antonio, Puerto Rico
  6. 3.0 54 km N of Carrizales, Puerto Rico
  7. 2.8 40 km N of Tierras Nuevas Poniente, Puerto Rico
  8. 2.5 29 km N of Isabela, Puerto Rico
  9. 1.8 9 km ESE of Maricao, Puerto Rico
  10. 2.6 19 km N of Carrizales, Puerto Rico
  11. 2.0 1 km S of Maricao, Puerto Rico
  12. 2.1 1 km SE of Añasco, Puerto Rico
  13. 2.7 28 km NNW of Brenas, Puerto Rico
  14. 2.5 4 km W of San Sebastián, Puerto Rico
  15. 1.8 4 km E of Las Marías, 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.