QuakeIndex

Earthquake · reviewed by a seismologist

M 2.9Md

8 km N of Quebradillas, Puerto Rico

· 73 km deep · released about 680 lb of TNT

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10 km30 km60 km120 km N Quebradillas Municipio 9 kmIsabela Municipio 11 kmCamuy Municipio 14 kmHatillo Municipio 19 kmAguadilla Municipio 23 kmSan Sebastián Municipio 25 kmMoca Municipio 25 kmArecibo Municipio 30 kmLares 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 2.9 (Md)
Depth
73 km below the surface
Felt
no reports yet
Nearest
Quebradillas Municipio, 9 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3505 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 680 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 22,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 16,000× the energy of this one
  3. Around the size people start to feel M 3.0 1.4× the energy of this one
  4. This earthquake M 2.9 about 680 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 18.5489, -66.9330. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Quebradillas Municipio, PR 9 km (6 mi) N of here earthquakes near Quebradillas Municipio
Isabela Municipio, PR 11 km (7 mi) NE of here earthquakes near Isabela Municipio
Camuy Municipio, PR 14 km (8 mi) NNW of here earthquakes near Camuy Municipio
Hatillo Municipio, PR 19 km (12 mi) NW of here earthquakes near Hatillo Municipio
Aguadilla Municipio, PR 23 km (15 mi) ENE of here earthquakes near Aguadilla Municipio
San Sebastián Municipio, PR 25 km (15 mi) N of here earthquakes near San Sebastián Municipio

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

Aftershocks so far

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

  1. 2.9 53 km N of Isabela, Puerto Rico
  2. 2.7 52 km N of Carrizales, Puerto Rico
  3. 3.0 15 km NNE of Carrizales, Puerto Rico
  4. 2.8 48 km N of Isabela, Puerto Rico
  5. 1.7 6 km NNE of San Germán, Puerto Rico
  6. 2.6 12 km N of Garrochales, Puerto Rico
  7. 2.5 10 km N of Hatillo, Puerto Rico
  8. 2.3 2 km NNE of Mayagüez, Puerto Rico
  9. 2.5 4 km WSW of Las Marías, Puerto Rico
  10. 2.6 34 km NNW of San Antonio, Puerto Rico
  11. 2.3 4 km WSW of Las Marías, Puerto Rico
  12. 2.3 5 km NNE of San Germán, Puerto Rico
  13. 2.7 8 km WNW of Maricao, Puerto Rico
  14. 2.3 10 km NNE of Carrizales, Puerto Rico
  15. 2.6 13 km WNW 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.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.