QuakeIndex

Earthquake · reviewed by a seismologist

M 3.1md

4 km N of Carrizales, Puerto Rico

· 15 km deep · released about 1,600 lb of TNT

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10 km30 km60 km120 km N Hatillo Municipio 9 kmCamuy Municipio 11 kmQuebradillas Municipio 15 kmArecibo Municipio 16 kmIsabela Municipio 23 kmBarceloneta Municipio 26 kmSan Sebastián Municipio 28 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
15 km below the surface
Felt
1 report · strongest reported intensity II
Nearest
Hatillo Municipio, 9 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1401 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 1 person has reported feeling it to USGS.

How big was it?

This earthquake released about 1,600 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.2 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 210,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 9,400× the energy of this one
  3. Magna, Utah 2020 M 5.7 6,700× the energy of this one
  4. This earthquake M 3.1 about 1,600 lb of TNT
  5. Around the size people start to feel M 3.0 this one released 1.7× 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 18.5215, -66.7948. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Hatillo Municipio, PR 9 km (6 mi) N of here earthquakes near Hatillo Municipio
Camuy Municipio, PR 11 km (7 mi) NE of here earthquakes near Camuy Municipio
Quebradillas Municipio, PR 15 km (9 mi) ENE of here earthquakes near Quebradillas Municipio
Arecibo Municipio, PR 16 km (10 mi) NW of here earthquakes near Arecibo Municipio
Isabela Municipio, PR 23 km (15 mi) E of here earthquakes near Isabela Municipio
Barceloneta Municipio, PR 26 km (16 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

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

  1. 2.2 6 km N of San Germán, Puerto Rico
  2. 1.9 Puerto Rico region
  3. 3.1 2 km WSW of Maricao, Puerto Rico
  4. 2.6 20 km N of Tierras Nuevas Poniente, Puerto Rico
  5. 3.5 8 km NW of Camuy, Puerto Rico
  6. 2.5 7 km ENE of Hormigueros, Puerto Rico
  7. 2.2 6 km NNW of Jayuya, Puerto Rico
  8. 3.0 2 km ENE of Mayagüez, Puerto Rico
  9. 2.8 14 km N of Hatillo, Puerto Rico
  10. 2.3 4 km WNW of Santo Domingo, Puerto Rico
  11. 4.2 15 km N of Isabela, Puerto Rico
  12. 2.9 1 km ENE of Mayag?ez, Puerto Rico
  13. 2.0 Puerto Rico region
  14. 2.8 19 km NNE of Arecibo, Puerto Rico
  15. 2.9 4 km N of Animas, 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.