QuakeIndex

Earthquake · reviewed by a seismologist

M 2.9md

4 km SE of Cataño, Puerto Rico

· 108 km deep · released about 720 lb of TNT

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10 km30 km60 km120 km N San Juan Municipio 2 kmCataño Municipio 8 kmGuaynabo Municipio 8 kmBayamón Municipio 11 kmTrujillo Alto Municipio 12 kmCarolina Municipio 12 kmToa Baja Municipio 13 kmLoíza Municipio 15 kmToa Alta 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
108 km below the surface
Felt
no reports yet
Nearest
San Juan Municipio, 2 km NE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3030 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 720 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 21,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 15,000× the energy of this one
  3. Around the size people start to feel M 3.0 1.3× the energy of this one
  4. This earthquake M 2.9 about 720 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 18.4125, -66.0838. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
San Juan Municipio, PR 2 km (1 mi) SW of here earthquakes near San Juan Municipio
Cataño Municipio, PR 8 km (5 mi) ESE of here earthquakes near Cataño Municipio
Guaynabo Municipio, PR 8 km (5 mi) NNE of here earthquakes near Guaynabo 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
Carolina Municipio, PR 12 km (8 mi) W of here earthquakes near Carolina Municipio

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

Aftershocks so far

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

  1. 2.9 3 km N of Palomas, Puerto Rico
  2. 2.2 2 km E of Arroyo, Puerto Rico
  3. 2.5 27 km N of Brenas, Puerto Rico
  4. 1.9 1 km NNE of Buena Vista, Puerto Rico
  5. 2.0 0 km S of Palmas, Puerto Rico
  6. 2.0 1 km NNE of Buena Vista, Puerto Rico
  7. 1.6 4 km N of Los Llanos, Puerto Rico
  8. 2.0 2 km N of Yaurel, Puerto Rico
  9. 2.7 22 km NNW of San Juan, Puerto Rico
  10. 3.0 6 km NW of Sabana, Puerto Rico
  11. 2.6 17 km N of Tierras Nuevas Poniente, Puerto Rico
  12. 2.5 3 km NW of Barahona, Puerto Rico
  13. 2.8 2 km NNW of Barceloneta, Puerto Rico
  14. 2.8 15 km NNE of Suárez, Puerto Rico
  15. 2.5 1 km WNW of Campanilla, 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.