QuakeIndex

Earthquake · reviewed by a seismologist

M 2.7md

5 km ESE of San Juan, Puerto Rico

· 83 km deep · released about 380 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N San Juan Municipio 3 kmCataño Municipio 10 kmCarolina Municipio 11 kmLoíza Municipio 12 kmGuaynabo Municipio 13 kmTrujillo Alto Municipio 14 kmToa Baja Municipio 14 kmBayamón Municipio 16 kmGurabo Municipio 21 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 2.7 (md)
Depth
83 km below the surface
Felt
no reports yet
Nearest
San Juan Municipio, 3 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2928 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 380 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.7 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 40,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 29,000× the energy of this one
  3. Around the size people start to feel M 3.0 2.5× the energy of this one
  4. This earthquake M 2.7 about 380 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 18.4496, -66.0586. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
San Juan Municipio, PR 3 km (2 mi) NNE of here earthquakes near San Juan Municipio
Cataño Municipio, PR 10 km (6 mi) E of here earthquakes near Cataño Municipio
Carolina Municipio, PR 11 km (7 mi) WNW of here earthquakes near Carolina Municipio
Loíza Municipio, PR 12 km (8 mi) W of here earthquakes near Loíza Municipio
Guaynabo Municipio, PR 13 km (8 mi) NNE of here earthquakes near Guaynabo Municipio
Trujillo Alto Municipio, PR 14 km (9 mi) NNW 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

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

  1. 2.6 2 km ENE of Corozal, Puerto Rico
  2. 2.7 20 km N of Luquillo, Puerto Rico
  3. 2.9 37 km N of San Juan, Puerto Rico
  4. 1.7 5 km E of Comerío, Puerto Rico
  5. 2.2 34 km N of Loíza, Puerto Rico
  6. 2.7 34 km N of Brenas, Puerto Rico
  7. 2.5 4 km SW of Patillas, Puerto Rico
  8. 1.9 2 km N of Carolina, Puerto Rico
  9. 1.7 33 km N of San Juan, Puerto Rico
  10. 2.1 4 km ESE of Palmarejo, Puerto Rico
  11. 2.1 1 km SSE of G. L. Garcia, Puerto Rico
  12. 2.1 6 km NNW of Loíza, Puerto Rico
  13. 2.2 3 km SSW of Pastos, Puerto Rico
  14. 1.7 3 km ENE of Pastos, Puerto Rico
  15. 2.8 37 km N of San Juan, 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.