QuakeIndex

Earthquake · reviewed by a seismologist

M 3.2md

25 km N of Loíza, Puerto Rico

· 67 km deep · released about 1,800 lb of TNT

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10 km30 km60 km120 km N Loíza Municipio 26 kmCarolina Municipio 32 kmRío Grande Municipio 32 kmSan Juan Municipio 35 kmLuquillo Municipio 36 kmCanóvanas Municipio 37 kmCataño Municipio 39 kmTrujillo Alto Municipio 39 kmToa Baja Municipio 42 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
67 km below the surface
Felt
no reports yet
Nearest
Loíza Municipio, 26 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2493 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 1,800 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 6.7 180,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 8,200× the energy of this one
  3. Magna, Utah 2020 M 5.7 5,800× the energy of this one
  4. This earthquake M 3.2 about 1,800 lb of TNT
  5. Around the size people start to feel M 3.0 this one released 1.9× 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 18.6613, -65.8601. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Loíza Municipio, PR 26 km (16 mi) NNE of here earthquakes near Loíza Municipio
Carolina Municipio, PR 32 km (20 mi) NNE of here earthquakes near Carolina Municipio
Río Grande Municipio, PR 32 km (20 mi) NNW of here earthquakes near Río Grande Municipio
San Juan Municipio, PR 35 km (21 mi) NE of here earthquakes near San Juan Municipio
Luquillo Municipio, PR 36 km (23 mi) NNW of here earthquakes near Luquillo Municipio
Canóvanas Municipio, PR 37 km (23 mi) N of here earthquakes near Canóvanas Municipio

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

Aftershocks so far

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

  1. 2.9 16 km NNE of Suárez, Puerto Rico
  2. 2.6 33 km N of San Juan, Puerto Rico
  3. 2.9 67 km NNE of Vieques, Puerto Rico
  4. 2.9 37 km NNE of Vieques, Puerto Rico
  5. 2.4 2 km S of Guaynabo, Puerto Rico
  6. 3.3 5 km SE of Pájaros, Puerto Rico
  7. 2.0 Puerto Rico region
  8. 2.9 41 km NNE of Luquillo, Puerto Rico
  9. 3.1 51 km N of Dorado, Puerto Rico
  10. 3.1 3 km NNW of Loíza, Puerto Rico
  11. 3.4 67 km NNE of San Juan, Puerto Rico
  12. 3.5 6 km NW of Trujillo Alto, Puerto Rico
  13. 3.4 19 km NNE of Luquillo, Puerto Rico
  14. 3.2 47 km N of Brenas, Puerto Rico
  15. 2.6 33 km N of San Juan, 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.