QuakeIndex

Earthquake · reviewed by a seismologist

M 3.2md

6 km NNW of Arecibo, Puerto Rico

· 125 km deep · released about 1.1 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Hatillo Municipio 10 kmArecibo Municipio 12 kmCamuy Municipio 15 kmQuebradillas Municipio 20 kmBarceloneta Municipio 20 kmFlorida Municipio 26 kmManatí Municipio 28 kmUtuado Municipio 28 kmIsabela Municipio 29 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
125 km below the surface
Felt
1 report · strongest reported intensity III
Nearest
Hatillo Municipio, 10 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 345 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 1.1 tons 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 6.7 150,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 6,900× the energy of this one
  3. Magna, Utah 2020 M 5.7 4,900× the energy of this one
  4. This earthquake M 3.2 about 1.1 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 2.3× 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 18.5203, -66.7443. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Hatillo Municipio, PR 10 km (7 mi) NNE of here earthquakes near Hatillo Municipio
Arecibo Municipio, PR 12 km (7 mi) NW of here earthquakes near Arecibo Municipio
Camuy Municipio, PR 15 km (9 mi) ENE of here earthquakes near Camuy Municipio
Quebradillas Municipio, PR 20 km (13 mi) ENE of here earthquakes near Quebradillas Municipio
Barceloneta Municipio, PR 20 km (13 mi) WNW of here earthquakes near Barceloneta Municipio
Florida Municipio, PR 26 km (16 mi) NW of here earthquakes near Florida Municipio

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

Aftershocks so far

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

  1. 2.1 1 km SSW of Adjuntas, Puerto Rico
  2. 2.6 7 km WNW of Adjuntas, Puerto Rico
  3. 2.2 5 km NW of Orocovis, Puerto Rico
  4. 2.0 11 km ESE of Maricao, Puerto Rico
  5. 2.5 20 km NNE of Carrizales, Puerto Rico
  6. 2.3 5 km W of Maricao, Puerto Rico
  7. 3.0 36 km N of Arecibo, Puerto Rico
  8. 2.4 2 km WNW of Arecibo, Puerto Rico
  9. 2.7 19 km N of Hatillo, Puerto Rico
  10. 1.9 8 km WSW of Adjuntas, Puerto Rico
  11. 3.0 31 km N of Tierras Nuevas Poniente, Puerto Rico
  12. 3.3 4 km WSW of Las Marías, Puerto Rico
  13. 2.5 3 km SW of Luyando, Puerto Rico
  14. 3.2 40 km N of Isabela, Puerto Rico
  15. 3.0 3 km SW of Vega Alta, 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 55 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.