QuakeIndex

Earthquake · reviewed by a seismologist

M 3.1md

2 km NW of Cataño, Puerto Rico

· 101 km deep · released about 1,600 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Cataño Municipio 2 kmToa Baja Municipio 6 kmSan Juan Municipio 8 kmBayamón Municipio 13 kmGuaynabo Municipio 13 kmDorado Municipio 13 kmToa Alta Municipio 15 kmCarolina Municipio 19 kmTrujillo Alto 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 3.1 (md)
Depth
101 km below the surface
Felt
2 reports · strongest reported intensity IV
Nearest
Cataño Municipio, 2 km SW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1570 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 1,600 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.2 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 210,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 9,400× the energy of this one
  3. Magna, Utah 2020 M 5.7 6,700× the energy of this one
  4. This earthquake M 3.1 about 1,600 lb of TNT
  5. Around the size people start to feel M 3.0 this one released 1.7× 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 18.4582, -66.1377. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Cataño Municipio, PR 2 km (1 mi) NE of here earthquakes near Cataño Municipio
Toa Baja Municipio, PR 6 km (4 mi) E of here earthquakes near Toa Baja Municipio
San Juan Municipio, PR 8 km (5 mi) WNW of here earthquakes near San Juan Municipio
Bayamón Municipio, PR 13 km (8 mi) NNE of here earthquakes near Bayamón Municipio
Guaynabo Municipio, PR 13 km (8 mi) N of here earthquakes near Guaynabo Municipio
Dorado Municipio, PR 13 km (8 mi) E of here earthquakes near Dorado 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. 2.2 3 km N of Orocovis, Puerto Rico
  2. 3.6 1 km NNW of San José, Puerto Rico
  3. 3.0 3 km ESE of Cayey, Puerto Rico
  4. 3.0 3 km E of Cayey, Puerto Rico
  5. 1.8 2 km SW of G. L. Garcia, Puerto Rico
  6. 2.5 6 km NNW of Los Llanos, Puerto Rico
  7. 2.7 4 km SE of Morovis, Puerto Rico
  8. 3.8 5 km ENE of San Juan, Puerto Rico
  9. 2.2 Puerto Rico region
  10. 2.6 2 km ENE of Bayamon, Puerto Rico
  11. 3.3 1 km S of Comerío, Puerto Rico
  12. 3.2 2 km ESE of Mucarabones, Puerto Rico
  13. 3.2 17 km N of Tierras Nuevas Poniente, Puerto Rico
  14. 3.0 4 km NNW of Vega Baja, Puerto Rico
  15. 2.0 0 km ENE of Parcelas La Milagrosa, 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.

For this area

The largest earthquake within 50 km in our catalogue was M 4.4 on 2018-12-09 — it released about 75 times the energy of this one.

From the QuakeIndex catalogue, built from the USGS FDSN event service.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.