QuakeIndex

Earthquake · reviewed by a seismologist

M 2.9md

3 km N of Trujillo Alto, Puerto Rico

· 135 km deep · released about 570 lb of TNT

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10 km30 km60 km120 km N Carolina Municipio 4 kmTrujillo Alto Municipio 5 kmSan Juan Municipio 8 kmLoíza Municipio 9 kmGuaynabo Municipio 12 kmGurabo Municipio 13 kmCanóvanas Municipio 14 kmCataño Municipio 17 kmBayamón Municipio 18 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
135 km below the surface
Felt
no reports yet
Nearest
Carolina Municipio, 4 km ENE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3282 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 570 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 27,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 19,000× the energy of this one
  3. Around the size people start to feel M 3.0 1.7× the energy of this one
  4. This earthquake M 2.9 about 570 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 18.3836, -66.0045. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Carolina Municipio, PR 4 km (3 mi) WSW of here earthquakes near Carolina Municipio
Trujillo Alto Municipio, PR 5 km (3 mi) N of here earthquakes near Trujillo Alto Municipio
San Juan Municipio, PR 8 km (5 mi) ESE of here earthquakes near San Juan Municipio
Loíza Municipio, PR 9 km (6 mi) SW of here earthquakes near Loíza Municipio
Guaynabo Municipio, PR 12 km (8 mi) ENE of here earthquakes near Guaynabo Municipio
Gurabo Municipio, PR 13 km (8 mi) NNW of here earthquakes near Gurabo Municipio

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

Aftershocks so far

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

  1. 2.9 15 km NNE of Brenas, Puerto Rico
  2. 2.5 5 km ESE of G. L. Garcia, Puerto Rico
  3. 3.0 1 km SE of Corozal, Puerto Rico
  4. 2.8 15 km N of Brenas, Puerto Rico
  5. 2.5 25 km NNE of Luquillo, Puerto Rico
  6. 2.9 24 km N of Brenas, Puerto Rico
  7. 2.7 6 km SSW of Corozal, Puerto Rico
  8. 3.1 5 km NE of Orocovis, Puerto Rico
  9. 2.4 2 km W of Aibonito, Puerto Rico
  10. 2.8 23 km NNE of Playa Fortuna, Puerto Rico
  11. 2.5 18 km NNE of Playa Fortuna, Puerto Rico
  12. 2.6 22 km NNE of Playa Fortuna, Puerto Rico
  13. 3.0 6 km NW of Palomas, Puerto Rico
  14. 2.4 24 km NNE of Luquillo, Puerto Rico
  15. 2.9 2 km NNE of Franquez, 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.