QuakeIndex

Earthquake · reviewed by a seismologist

M 3.1md

4 km NNE of Hatillo, Puerto Rico

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

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10 km30 km60 km120 km N Hatillo Municipio 9 kmCamuy Municipio 10 kmQuebradillas Municipio 14 kmArecibo Municipio 17 kmIsabela Municipio 22 kmSan Sebastián Municipio 27 kmBarceloneta Municipio 27 kmLares Municipio 28 kmUtuado Municipio 30 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
93 km below the surface
Felt
no reports yet
Nearest
Hatillo Municipio, 9 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3133 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 18.5200, -66.8115. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Hatillo Municipio, PR 9 km (6 mi) N of here earthquakes near Hatillo Municipio
Camuy Municipio, PR 10 km (6 mi) NNE of here earthquakes near Camuy Municipio
Quebradillas Municipio, PR 14 km (8 mi) ENE of here earthquakes near Quebradillas Municipio
Arecibo Municipio, PR 17 km (11 mi) WNW of here earthquakes near Arecibo Municipio
Isabela Municipio, PR 22 km (13 mi) E of here earthquakes near Isabela Municipio
San Sebastián Municipio, PR 27 km (17 mi) NE of here earthquakes near San Sebastián Municipio

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

Aftershocks so far

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

  1. 1.9 2 km ESE of La Playa, Puerto Rico
  2. 2.3 21 km NNW of Camuy, Puerto Rico
  3. 1.9 1 km SSE of La Playa, Puerto Rico
  4. 1.7 9 km W of Adjuntas, Puerto Rico
  5. 2.2 5 km NE of San Germán, Puerto Rico
  6. 2.5 48 km N of Carrizales, Puerto Rico
  7. 2.2 21 km NNE of Isabela, Puerto Rico
  8. 2.7 26 km NNW of Brenas, Puerto Rico
  9. 2.3 5 km N of Hatillo, Puerto Rico
  10. 1.8 5 km NE of Maricao, Puerto Rico
  11. 2.6 5 km N of Brenas, Puerto Rico
  12. 1.9 8 km NNE of Animas, Puerto Rico
  13. 2.7 10 km NNW of Tierras Nuevas Poniente, Puerto Rico
  14. 3.0 1 km E of Barceloneta, Puerto Rico
  15. 3.0 11 km N of Camuy, 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.