QuakeIndex

Earthquake · reviewed by a seismologist

M 2.8md

4 km E of Bayamón, Puerto Rico

· 115 km deep · released about 420 lb of TNT

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10 km30 km60 km120 km N San Juan Municipio 6 kmGuaynabo Municipio 6 kmCataño Municipio 6 kmBayamón Municipio 8 kmToa Baja Municipio 11 kmTrujillo Alto Municipio 14 kmToa Alta Municipio 14 kmCarolina Municipio 15 kmAguas Buenas Municipio 16 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
115 km below the surface
Felt
no reports yet
Nearest
San Juan Municipio, 6 km ENE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2840 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 420 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 36,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 26,000× the energy of this one
  3. Around the size people start to feel M 3.0 2.3× the energy of this one
  4. This earthquake M 2.8 about 420 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 18.3981, -66.1148. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
San Juan Municipio, PR 6 km (3 mi) WSW of here earthquakes near San Juan Municipio
Guaynabo Municipio, PR 6 km (4 mi) N of here earthquakes near Guaynabo Municipio
Cataño Municipio, PR 6 km (4 mi) SE of here earthquakes near Cataño Municipio
Bayamón Municipio, PR 8 km (5 mi) NE of here earthquakes near Bayamón Municipio
Toa Baja Municipio, PR 11 km (7 mi) SE of here earthquakes near Toa Baja Municipio
Trujillo Alto Municipio, PR 14 km (8 mi) WNW 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

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

  1. 1.8 8 km SSW of Ciales, Puerto Rico
  2. 2.5 31 km NNE of San Juan, Puerto Rico
  3. 1.9 3 km ENE of Bairoa, Puerto Rico
  4. 2.4 24 km N of Dorado, Puerto Rico
  5. 2.2 1 km NW of Sumidero, Puerto Rico
  6. 2.7 2 km SW of H. Rivera Colon, Puerto Rico
  7. 2.0 20 km NE of San Juan, Puerto Rico
  8. 2.6 3 km N of Cidra, Puerto Rico
  9. 2.5 6 km ESE of San Juan, Puerto Rico
  10. 2.1 0 km SW of Toa Alta, Puerto Rico
  11. 2.6 24 km N of San Juan, Puerto Rico
  12. 2.9 13 km NNW of Brenas, Puerto Rico
  13. 2.1 37 km N of San Juan, Puerto Rico
  14. 1.5 18 km NNE of Tierras Nuevas Poniente, Puerto Rico
  15. 1.9 6 km WNW of Palomas, 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.