QuakeIndex

Earthquake · reviewed by a seismologist

M 3.3Md

48 km N of Isabela, Puerto Rico

· 28 km deep · released about 1.3 tons of TNT

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10 km30 km60 km120 km N Isabela Municipio 51 kmQuebradillas Municipio 53 kmAguadilla Municipio 53 kmCamuy Municipio 57 kmHatillo Municipio 59 kmMoca Municipio 63 kmAguada Municipio 66 kmArecibo Municipio 66 kmSan Sebastián Municipio 68 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 3.3 (Md)
Depth
28 km below the surface
Felt
no reports yet
Nearest
Isabela Municipio, 51 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3501 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 1.3 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.3 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 130,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 5,600× the energy of this one
  3. Magna, Utah 2020 M 5.7 4,000× the energy of this one
  4. This earthquake M 3.3 about 1.3 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 2.8× 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 18.9409, -66.9990. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Isabela Municipio, PR 51 km (32 mi) N of here earthquakes near Isabela Municipio
Quebradillas Municipio, PR 53 km (33 mi) N of here earthquakes near Quebradillas Municipio
Aguadilla Municipio, PR 53 km (33 mi) NNE of here earthquakes near Aguadilla Municipio
Camuy Municipio, PR 57 km (35 mi) NNW of here earthquakes near Camuy Municipio
Hatillo Municipio, PR 59 km (37 mi) NNW of here earthquakes near Hatillo Municipio
Moca Municipio, PR 63 km (39 mi) N of here earthquakes near Moca 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. 2.9 63 km N of Hatillo, Puerto Rico
  2. 3.0 62 km N of Hatillo, Puerto Rico
  3. 2.6 34 km NW of San Antonio, Puerto Rico
  4. 3.0 63 km N of Hatillo, Puerto Rico
  5. 2.8 62 km NNE of Isabela, Puerto Rico
  6. 2.5 17 km N of Camuy, Puerto Rico
  7. 3.4 78 km N of San Antonio, Puerto Rico
  8. 2.6 16 km N of Quebradillas, Puerto Rico
  9. 2.9 14 km NNE of Carrizales, Puerto Rico
  10. 3.1 85 km N of Isabela, Puerto Rico
  11. 3.3 87 km N of Isabela, Puerto Rico
  12. 3.2 15 km NNW of Camuy, Puerto Rico
  13. 2.9 66 km N of Hatillo, Puerto Rico
  14. 3.3 74 km N of Isabela, Puerto Rico
  15. 3.1 58 km N of Hatillo, 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.