QuakeIndex

Earthquake · reviewed by a seismologist

M 3.2md

10 km NNE of Arecibo, Puerto Rico

· 105 km deep · released about 1,800 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Arecibo Municipio 15 kmBarceloneta Municipio 17 kmHatillo Municipio 18 kmCamuy Municipio 23 kmManatí Municipio 24 kmFlorida Municipio 25 kmQuebradillas Municipio 28 kmVega Baja Municipio 33 kmUtuado Municipio 33 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
105 km below the surface
Felt
1 report · strongest reported intensity II
Nearest
Arecibo Municipio, 15 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 983 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 1,800 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 6.7 180,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 8,200× the energy of this one
  3. Magna, Utah 2020 M 5.7 5,800× the energy of this one
  4. This earthquake M 3.2 about 1,800 lb of TNT
  5. Around the size people start to feel M 3.0 this one released 1.9× 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 18.5663, -66.6850. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Arecibo Municipio, PR 15 km (9 mi) N of here earthquakes near Arecibo Municipio
Barceloneta Municipio, PR 17 km (11 mi) NW of here earthquakes near Barceloneta Municipio
Hatillo Municipio, PR 18 km (11 mi) NE of here earthquakes near Hatillo Municipio
Camuy Municipio, PR 23 km (14 mi) NE of here earthquakes near Camuy Municipio
Manatí Municipio, PR 24 km (15 mi) NW of here earthquakes near Manatí Municipio
Florida Municipio, PR 25 km (16 mi) NNW of here earthquakes near Florida 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. 2.8 3 km W of Miranda, Puerto Rico
  2. 2.9 7 km NNW of Dorado, Puerto Rico
  3. 1.9 Puerto Rico region
  4. 2.6 20 km N of Tierras Nuevas Poniente, Puerto Rico
  5. 3.5 8 km NW of Camuy, Puerto Rico
  6. 3.0 4 km NW of Corozal, Puerto Rico
  7. 2.2 6 km NNW of Jayuya, Puerto Rico
  8. 2.8 14 km N of Hatillo, Puerto Rico
  9. 4.2 15 km N of Isabela, Puerto Rico
  10. 2.0 Puerto Rico region
  11. 2.8 19 km NNE of Arecibo, Puerto Rico
  12. 2.9 4 km N of Animas, Puerto Rico
  13. 2.8 20 km N of Arecibo, Puerto Rico
  14. 3.1 12 km N of Brenas, Puerto Rico
  15. 2.3 3 km ESE 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.

For this area

The largest earthquake within 50 km in our catalogue was M 4.4 on 2018-12-09 — it released about 65 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.