QuakeIndex

Earthquake · reviewed by a seismologist

M 2.8md

3 km N of San Juan, Puerto Rico

· 110 km deep · released about 530 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Cataño Municipio 7 kmSan Juan Municipio 9 kmToa Baja Municipio 10 kmDorado Municipio 16 kmGuaynabo Municipio 17 kmBayamón Municipio 17 kmLoíza Municipio 18 kmCarolina Municipio 18 kmToa Alta Municipio 20 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
110 km below the surface
Felt
no reports yet
Nearest
Cataño Municipio, 7 km SW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3327 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 530 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 29,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 20,000× the energy of this one
  3. Around the size people start to feel M 3.0 1.8× the energy of this one
  4. This earthquake M 2.8 about 530 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 18.4951, -66.1090. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Cataño Municipio, PR 7 km (4 mi) NE of here earthquakes near Cataño Municipio
San Juan Municipio, PR 9 km (6 mi) NNW of here earthquakes near San Juan Municipio
Toa Baja Municipio, PR 10 km (6 mi) ENE of here earthquakes near Toa Baja Municipio
Dorado Municipio, PR 16 km (10 mi) E of here earthquakes near Dorado Municipio
Guaynabo Municipio, PR 17 km (10 mi) N of here earthquakes near Guaynabo Municipio
Bayamón Municipio, PR 17 km (11 mi) NNE of here earthquakes near Bayamón Municipio

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

Aftershocks so far

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

  1. 2.7 10 km NNW of Tierras Nuevas Poniente, Puerto Rico
  2. 3.0 1 km E of Barceloneta, Puerto Rico
  3. 2.5 2 km WNW of Sabana, Puerto Rico
  4. 2.4 5 km SW of Orocovis, Puerto Rico
  5. 3.3 4 km NE of Brenas, Puerto Rico
  6. 2.7 2 km NW of Candelero Arriba, Puerto Rico
  7. 3.0 4 km SSE of Cayey, Puerto Rico
  8. 3.1 Puerto Rico region
  9. 3.3 12 km NNE of Tierras Nuevas Poniente, Puerto Rico
  10. 2.5 5 km E of Bayamon, Puerto Rico
  11. 3.1 1 km SW of Trujillo Alto, Puerto Rico
  12. 2.6 1 km NW of Aguas Buenas, Puerto Rico
  13. 2.8 3 km E of Tierras Nuevas Poniente, Puerto Rico
  14. 2.9 24 km N of Loíza, Puerto Rico
  15. 3.1 47 km N of Loíza, 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.