QuakeIndex

Earthquake · reviewed by a seismologist

M 3.1md

5 km ESE of Cataño, Puerto Rico

· 124 km deep · released about 1,200 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N San Juan Municipio 1 kmCataño Municipio 9 kmGuaynabo Municipio 9 kmCarolina Municipio 11 kmTrujillo Alto Municipio 12 kmBayamón Municipio 12 kmToa Baja Municipio 13 kmLoíza Municipio 14 kmAguas Buenas Municipio 19 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 3.1 (md)
Depth
124 km below the surface
Felt
2 reports · strongest reported intensity II
Nearest
San Juan Municipio, 1 km NE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3278 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 2 people have reported feeling it to USGS.

How big was it?

This earthquake released about 1,200 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.1 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 290,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 13,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 9,100× the energy of this one
  4. This earthquake M 3.1 about 1,200 lb of TNT
  5. Around the size people start to feel M 3.0 this one released 1.2× more

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 18.4165, -66.0738. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
San Juan Municipio, PR 1 km (1 mi) SW of here earthquakes near San Juan Municipio
Cataño Municipio, PR 9 km (5 mi) ESE of here earthquakes near Cataño Municipio
Guaynabo Municipio, PR 9 km (6 mi) NNE of here earthquakes near Guaynabo Municipio
Carolina Municipio, PR 11 km (7 mi) W of here earthquakes near Carolina Municipio
Trujillo Alto Municipio, PR 12 km (7 mi) NW of here earthquakes near Trujillo Alto Municipio
Bayamón Municipio, PR 12 km (8 mi) NE of here earthquakes near Bayamón 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. 2.3 3 km NNW of Patillas, Puerto Rico
  2. 2.8 3 km E of Tierras Nuevas Poniente, Puerto Rico
  3. 2.9 24 km N of Loíza, Puerto Rico
  4. 3.0 44 km N of Loíza, Puerto Rico
  5. 2.8 35 km N of San Juan, Puerto Rico
  6. 2.6 2 km NNW of El Negro, Puerto Rico
  7. 2.8 1 km NNE of Yabucoa, Puerto Rico
  8. 3.0 10 km NNW of San Juan, Puerto Rico
  9. 2.6 6 km NNW of Bairoa, Puerto Rico
  10. 2.7 1 km SSE of Brenas, Puerto Rico
  11. 3.2 4 km WNW of Aguas Claras, Puerto Rico
  12. 2.9 15 km NNE of Brenas, Puerto Rico
  13. 2.5 5 km ESE of G. L. Garcia, Puerto Rico
  14. 3.0 1 km SE of Corozal, Puerto Rico
  15. 2.8 15 km N of Brenas, 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.