QuakeIndex

Earthquake · reviewed by a seismologist

M 3.2md

4 km SE of Cataño, Puerto Rico

· 96 km deep · released about 1,700 lb of TNT

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10 km30 km60 km120 km N San Juan Municipio 3 kmGuaynabo Municipio 7 kmCataño Municipio 8 kmBayamón Municipio 11 kmTrujillo Alto Municipio 12 kmToa Baja Municipio 12 kmCarolina Municipio 13 kmLoíza Municipio 16 kmToa Alta Municipio 17 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
96 km below the surface
Felt
no reports yet
Nearest
San Juan Municipio, 3 km NE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1757 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 1,700 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 6.7 200,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 9,100× the energy of this one
  3. Magna, Utah 2020 M 5.7 6,500× the energy of this one
  4. This earthquake M 3.2 about 1,700 lb of TNT
  5. Around the size people start to feel M 3.0 this one released 1.7× 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 18.4063, -66.0886. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
San Juan Municipio, PR 3 km (2 mi) SW of here earthquakes near San Juan Municipio
Guaynabo Municipio, PR 7 km (5 mi) NNE of here earthquakes near Guaynabo Municipio
Cataño Municipio, PR 8 km (5 mi) SE of here earthquakes near Cataño Municipio
Bayamón Municipio, PR 11 km (7 mi) NE of here earthquakes near Bayamón Municipio
Trujillo Alto Municipio, PR 12 km (7 mi) NW of here earthquakes near Trujillo Alto Municipio
Toa Baja Municipio, PR 12 km (8 mi) ESE of here earthquakes near Toa Baja Municipio

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

Aftershocks so far

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

  1. 3.2 3 km S of Guaynabo, Puerto Rico
  2. 2.5 3 km S of Barranquitas, Puerto Rico
  3. 3.2 38 km N of San Juan, Puerto Rico
  4. 3.5 1 km ENE of Dorado, Puerto Rico
  5. 3.0 5 km ESE of Cataño, Puerto Rico
  6. 3.5 14 km NNW of Brenas, Puerto Rico
  7. 2.8 1 km NW of Cidra, Puerto Rico
  8. 3.5 22 km NNE of Tierras Nuevas Poniente, Puerto Rico
  9. 2.0 2 km NNW of Orocovis, Puerto Rico
  10. 2.5 19 km N of San Juan, Puerto Rico
  11. 3.4 6 km N of Tierras Nuevas Poniente, Puerto Rico
  12. 3.1 3 km NE of Tierras Nuevas Poniente, Puerto Rico
  13. 2.9 2 km NNE of Levittown, Puerto Rico
  14. 2.8 12 km NNW of Sabana, Puerto Rico
  15. 2.3 3 km NNE of Olimpo, 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.