QuakeIndex

Earthquake · reviewed by a seismologist

M 3.2md

23 km N of Isabela, Puerto Rico

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

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Isabela Municipio 26 kmAguadilla Municipio 28 kmQuebradillas Municipio 30 kmCamuy Municipio 36 kmMoca Municipio 37 kmAguada Municipio 40 kmHatillo Municipio 40 kmSan Sebastián Municipio 43 kmRincón Municipio 47 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
25 km below the surface
Felt
1 report · strongest reported intensity III
Nearest
Isabela Municipio, 26 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 512 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 18.7122, -67.0512. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Isabela Municipio, PR 26 km (16 mi) N of here earthquakes near Isabela Municipio
Aguadilla Municipio, PR 28 km (17 mi) NNE of here earthquakes near Aguadilla Municipio
Quebradillas Municipio, PR 30 km (19 mi) NNW of here earthquakes near Quebradillas Municipio
Camuy Municipio, PR 36 km (22 mi) NNW of here earthquakes near Camuy Municipio
Moca Municipio, PR 37 km (23 mi) N of here earthquakes near Moca Municipio
Aguada Municipio, PR 40 km (25 mi) NNE of here earthquakes near Aguada Municipio

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

Aftershocks so far

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

  1. 3.0 42 km NW of San Antonio, Puerto Rico
  2. 2.8 21 km N of San Antonio, Puerto Rico
  3. 2.7 3 km N of San Antonio, Puerto Rico
  4. 3.2 51 km NNW of San Antonio, Puerto Rico
  5. 3.0 48 km NNW of San Antonio, Puerto Rico
  6. 2.9 26 km N of Isabela, Puerto Rico
  7. 3.1 37 km NW of San Antonio, Puerto Rico
  8. 2.8 41 km N of Hatillo, Puerto Rico
  9. 2.9 2 km NNW of Carrizales, Puerto Rico
  10. 2.7 22 km NNE of Carrizales, Puerto Rico
  11. 3.4 68 km NNW of San Antonio, Puerto Rico
  12. 3.0 26 km N of Garrochales, Puerto Rico
  13. 3.4 61 km NW of San Antonio, Puerto Rico
  14. 2.9 50 km NW of San Antonio, Puerto Rico
  15. 3.2 24 km NNW 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 6.0 on 2019-09-24 — it released about 16,000 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.