QuakeIndex

Earthquake · reviewed by a seismologist

M 2.4md

8 km N of San Antonio, Puerto Rico

· 76 km deep · released about 140 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Aguadilla Municipio 11 kmIsabela Municipio 13 kmQuebradillas Municipio 21 kmMoca Municipio 21 kmAguada Municipio 23 kmCamuy Municipio 28 kmSan Sebastián Municipio 29 kmRincón Municipio 30 kmAñasco Municipio 31 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 2.4 (md)
Depth
76 km below the surface
Felt
no reports yet
Nearest
Aguadilla Municipio, 11 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2700 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

How big was it?

This earthquake released about 140 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.4 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 110,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 78,000× the energy of this one
  3. Around the size people start to feel M 3.0 6.9× the energy of this one
  4. This earthquake M 2.4 about 140 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 18.5658, -67.0963. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Aguadilla Municipio, PR 11 km (7 mi) NNE of here earthquakes near Aguadilla Municipio
Isabela Municipio, PR 13 km (8 mi) NW of here earthquakes near Isabela Municipio
Quebradillas Municipio, PR 21 km (13 mi) WNW of here earthquakes near Quebradillas Municipio
Moca Municipio, PR 21 km (13 mi) N of here earthquakes near Moca Municipio
Aguada Municipio, PR 23 km (14 mi) NNE of here earthquakes near Aguada Municipio
Camuy Municipio, PR 28 km (17 mi) WNW of here earthquakes near Camuy 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. 2.0 54 km NW of San Antonio, Puerto Rico
  2. 2.6 46 km NNW of San Antonio, Puerto Rico
  3. 2.9 17 km N of Hatillo, Puerto Rico
  4. 2.1 14 km NW of Puerto Real, Puerto Rico
  5. 1.8 4 km SW of Juncal, Puerto Rico
  6. 2.2 18 km NW of Aguadilla, Puerto Rico
  7. 2.4 36 km NNE of Isabela, Puerto Rico
  8. 2.0 4 km ENE of Las Marías, Puerto Rico
  9. 2.1 7 km SW of Mayagüez, Puerto Rico
  10. 2.2 7 km WSW of Mayagüez, Puerto Rico
  11. 2.2 19 km N of Arecibo, Puerto Rico
  12. 2.4 6 km NNE of Hatillo, Puerto Rico
  13. 1.7 10 km N of Hatillo, Puerto Rico
  14. 2.9 51 km NW of San Antonio, Puerto Rico
  15. 2.3 2 km NE of Rincón, 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 620 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.