QuakeIndex

Earthquake · reviewed by a seismologist

M 3.2md

21 km N of Quebradillas, Puerto Rico

· 19 km deep · released about 1,700 lb of TNT

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10 km30 km60 km120 km N Quebradillas Municipio 22 kmIsabela Municipio 23 kmCamuy Municipio 25 kmHatillo Municipio 28 kmAguadilla Municipio 32 kmArecibo Municipio 36 kmMoca Municipio 36 kmSan Sebastián Municipio 38 kmAguada Municipio 43 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 3.2 (md)
Depth
19 km below the surface
Felt
no reports yet
Nearest
Quebradillas Municipio, 22 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1018 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 1,700 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 6.7 200,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 8,800× the energy of this one
  3. Magna, Utah 2020 M 5.7 6,200× the energy of this one
  4. This earthquake M 3.2 about 1,700 lb of TNT
  5. Around the size people start to feel M 3.0 this one released 1.8× 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 18.6670, -66.9167. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Quebradillas Municipio, PR 22 km (14 mi) N of here earthquakes near Quebradillas Municipio
Isabela Municipio, PR 23 km (14 mi) NNE of here earthquakes near Isabela Municipio
Camuy Municipio, PR 25 km (16 mi) NNW of here earthquakes near Camuy Municipio
Hatillo Municipio, PR 28 km (17 mi) NNW of here earthquakes near Hatillo Municipio
Aguadilla Municipio, PR 32 km (20 mi) NE of here earthquakes near Aguadilla Municipio
Arecibo Municipio, PR 36 km (23 mi) NW of here earthquakes near Arecibo Municipio

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

Aftershocks so far

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

  1. 1.7 7 km SSE of Lares, Puerto Rico
  2. 2.8 16 km N of Arecibo, Puerto Rico
  3. 3.0 0 km SSW of Añasco, Puerto Rico
  4. 3.5 19 km NNW of San Antonio, Puerto Rico
  5. 3.0 21 km NNE of Isabela, Puerto Rico
  6. 2.8 2 km ESE of Espino, Puerto Rico
  7. 2.7 14 km NE of Arecibo, Puerto Rico
  8. 3.2 49 km N of San Antonio, Puerto Rico
  9. 2.6 4 km NNE of Carrizales, Puerto Rico
  10. 3.2 Puerto Rico region
  11. 2.8 26 km NNE of Isabela, Puerto Rico
  12. 2.9 35 km N of Carrizales, Puerto Rico
  13. 2.8 20 km N of Carrizales, Puerto Rico
  14. 2.4 3 km W of Cayuco, Puerto Rico
  15. 3.0 40 km N of San Antonio, 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.

For this area

The largest earthquake within 50 km in our catalogue was M 4.8 on 2019-11-29 — it released about 260 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.