QuakeIndex

Earthquake · reviewed by a seismologist

M 3.2md

15 km NNW of San Antonio, Puerto Rico

· 72 km deep · released about 2,000 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Aguadilla Municipio 16 kmIsabela Municipio 21 kmAguada Municipio 28 kmMoca Municipio 28 kmQuebradillas Municipio 29 kmRincón Municipio 34 kmCamuy Municipio 35 kmSan Sebastián Municipio 37 kmAñasco Municipio 38 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
72 km below the surface
Felt
no reports yet
Nearest
Aguadilla Municipio, 16 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 416 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 2,000 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 6.7 170,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 7,700× the energy of this one
  3. Magna, Utah 2020 M 5.7 5,400× the energy of this one
  4. This earthquake M 3.2 about 2,000 lb of TNT
  5. Around the size people start to feel M 3.0 this one released 2.1× 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 18.6265, -67.1403. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Aguadilla Municipio, PR 16 km (10 mi) N of here earthquakes near Aguadilla Municipio
Isabela Municipio, PR 21 km (13 mi) NW of here earthquakes near Isabela Municipio
Aguada Municipio, PR 28 km (18 mi) N of here earthquakes near Aguada Municipio
Moca Municipio, PR 28 km (18 mi) NNW of here earthquakes near Moca Municipio
Quebradillas Municipio, PR 29 km (18 mi) NW of here earthquakes near Quebradillas Municipio
Rincón Municipio, PR 34 km (21 mi) NNE of here earthquakes near Rincón Municipio

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

Aftershocks so far

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

  1. 3.0 35 km NNW of San Antonio, Puerto Rico
  2. 3.0 3 km ESE of Moca, Puerto Rico
  3. 2.7 11 km SSW of Stella, Puerto Rico
  4. 2.4 5 km W of Mayagüez, Puerto Rico
  5. 2.6 11 km NW of San Antonio, Puerto Rico
  6. 2.9 4 km NW of Rincón, Puerto Rico
  7. 2.8 14 km NNE of Isabela, Puerto Rico
  8. 2.5 0 km S of San Sebastián, Puerto Rico
  9. 3.1 37 km NNW of San Antonio, Puerto Rico
  10. 3.3 62 km NNW of San Antonio, Puerto Rico
  11. 2.3 39 km NW of Rincón, Puerto Rico
  12. 2.3 2 km ESE of Mayagüez, Puerto Rico
  13. 2.4 22 km WNW of Rincón, Puerto Rico
  14. 2.5 20 km NNE of Carrizales, Puerto Rico
  15. 3.7 57 km NNE of Isabela, 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 5.1 on 2019-09-24 — it released about 600 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.