QuakeIndex

Earthquake · reviewed by a seismologist

M 2.7md

3 km NW of San Antonio, Puerto Rico

· 11 km deep · released about 350 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Isabela Municipio 4 kmQuebradillas Municipio 5 kmCamuy Municipio 13 kmMoca Municipio 15 kmSan Sebastián Municipio 16 kmAguadilla Municipio 17 kmHatillo Municipio 19 kmAguada Municipio 24 kmLares Municipio 25 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 2.7 (md)
Depth
11 km below the surface
Felt
no reports yet
Nearest
Isabela Municipio, 4 km WNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 185 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 350 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.7 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 43,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 31,000× the energy of this one
  3. Around the size people start to feel M 3.0 2.7× the energy of this one
  4. This earthquake M 2.7 about 350 lb of TNT

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 18.4718, -66.9788. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Isabela Municipio, PR 4 km (2 mi) ESE of here earthquakes near Isabela Municipio
Quebradillas Municipio, PR 5 km (3 mi) W of here earthquakes near Quebradillas Municipio
Camuy Municipio, PR 13 km (8 mi) WNW of here earthquakes near Camuy Municipio
Moca Municipio, PR 15 km (9 mi) NE of here earthquakes near Moca Municipio
San Sebastián Municipio, PR 16 km (10 mi) N of here earthquakes near San Sebastián Municipio
Aguadilla Municipio, PR 17 km (11 mi) E of here earthquakes near Aguadilla Municipio

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

Aftershocks so far

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

  1. 2.6 23 km NNE of Isabela, Puerto Rico
  2. 2.0 1 km N of Lluveras, Puerto Rico
  3. 2.2 6 km NNE of Sabana Eneas, Puerto Rico
  4. 2.1 5 km NNE of Adjuntas, Puerto Rico
  5. 1.6 8 km NW of Adjuntas, Puerto Rico
  6. 2.7 5 km SE of Lares, Puerto Rico
  7. 3.3 8 km NE of Isabela, Puerto Rico
  8. 3.5 5 km WNW of Mayagüez, Puerto Rico
  9. 2.0 6 km ENE of Adjuntas, Puerto Rico
  10. 2.4 4 km SSE of Utuado, Puerto Rico
  11. 2.1 4 km SSE of Utuado, Puerto Rico
  12. 2.4 5 km N of Adjuntas, Puerto Rico
  13. 2.6 6 km NNE of Sabana Eneas, Puerto Rico
  14. 2.9 10 km SW of Stella, Puerto Rico
  15. 2.6 5 km WSW of Mayagüez, 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 4.3 on 2017-10-14 — it released about 240 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.