QuakeIndex

Earthquake · reviewed by a seismologist

M 3.1md

1 km NW of Bayamón, Puerto Rico

· 115 km deep · released about 1,300 lb of TNT

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10 km30 km60 km120 km N Cataño Municipio 4 kmToa Baja Municipio 6 kmBayamón Municipio 7 kmGuaynabo Municipio 9 kmToa Alta Municipio 10 kmSan Juan Municipio 11 kmDorado Municipio 12 kmNaranjito Municipio 16 kmAguas Buenas Municipio 18 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
115 km below the surface
Felt
no reports yet
Nearest
Cataño Municipio, 4 km NNE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3273 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 1,300 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 6.7 260,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 12,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 8,200× the energy of this one
  4. This earthquake M 3.1 about 1,300 lb of TNT
  5. Around the size people start to feel M 3.0 this one released 1.4× 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 18.4116, -66.1681. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Cataño Municipio, PR 4 km (3 mi) SSW of here earthquakes near Cataño Municipio
Toa Baja Municipio, PR 6 km (4 mi) SSE of here earthquakes near Toa Baja Municipio
Bayamón Municipio, PR 7 km (4 mi) N of here earthquakes near Bayamón Municipio
Guaynabo Municipio, PR 9 km (6 mi) NW of here earthquakes near Guaynabo Municipio
Toa Alta Municipio, PR 10 km (6 mi) ENE of here earthquakes near Toa Alta Municipio
San Juan Municipio, PR 11 km (7 mi) W of here earthquakes near San Juan Municipio

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

Aftershocks so far

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

  1. 3.1 Puerto Rico region
  2. 3.3 12 km NNE of Tierras Nuevas Poniente, Puerto Rico
  3. 2.5 5 km E of Bayamon, Puerto Rico
  4. 3.1 1 km SW of Trujillo Alto, Puerto Rico
  5. 3.1 2 km ENE of Candelero Arriba, Puerto Rico
  6. 2.5 2 km ESE of Mariano Colón, Puerto Rico
  7. 2.6 1 km NW of Aguas Buenas, Puerto Rico
  8. 2.3 3 km NNW of Patillas, Puerto Rico
  9. 2.8 3 km E of Tierras Nuevas Poniente, Puerto Rico
  10. 2.9 24 km N of Loíza, Puerto Rico
  11. 1.6 0 km ESE of Villalba, Puerto Rico
  12. 2.8 35 km N of San Juan, Puerto Rico
  13. 3.1 28 km N of Tierras Nuevas Poniente, Puerto Rico
  14. 2.8 1 km NNE of Yabucoa, Puerto Rico
  15. 3.0 10 km NNW 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.