QuakeIndex

Earthquake · reviewed by a seismologist

M 2.8md

4 km SE of Cataño, Puerto Rico

· 107 km deep · released about 510 lb of TNT

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10 km30 km60 km120 km N San Juan Municipio 2 kmCataño Municipio 7 kmGuaynabo Municipio 8 kmBayamón Municipio 11 kmToa Baja Municipio 12 kmTrujillo Alto Municipio 13 kmCarolina Municipio 13 kmLoíza Municipio 16 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 2.8 (md)
Depth
107 km below the surface
Felt
no reports yet
Nearest
San Juan Municipio, 2 km ENE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3017 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 510 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 30,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 21,000× the energy of this one
  3. Around the size people start to feel M 3.0 1.9× the energy of this one
  4. This earthquake M 2.8 about 510 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 18.4160, -66.0866. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
San Juan Municipio, PR 2 km (1 mi) WSW of here earthquakes near San Juan Municipio
Cataño Municipio, PR 7 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
Toa Baja Municipio, PR 12 km (8 mi) ESE of here earthquakes near Toa Baja Municipio
Trujillo Alto Municipio, PR 13 km (8 mi) NW of here earthquakes near Trujillo Alto Municipio

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

Aftershocks so far

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

  1. 2.7 6 km NW of Sabana, Puerto Rico
  2. 2.4 2 km SSE of Cidra, Puerto Rico
  3. 2.5 3 km WSW of Sumidero, Puerto Rico
  4. 1.5 3 km W of Palo Seco, Puerto Rico
  5. 2.5 8 km NNE of Brenas, Puerto Rico
  6. 2.7 Puerto Rico region
  7. 2.4 18 km NNW of Brenas, Puerto Rico
  8. 2.3 28 km N of Loíza, Puerto Rico
  9. 2.4 13 km NE of Luquillo, Puerto Rico
  10. 2.3 36 km N of Dorado, Puerto Rico
  11. 2.1 0 km NE of Ciales, Puerto Rico
  12. 2.2 2 km ESE of Parcelas Nuevas, Puerto Rico
  13. 2.3 1 km WSW of Campo Rico, Puerto Rico
  14. 2.8 4 km NNW of Sabana, Puerto Rico
  15. 2.8 1 km NW of Naranjito, 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.