QuakeIndex

Earthquake · reviewed by a seismologist

M 3.1md

7 km NNW of Vega Baja, Puerto Rico

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

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10 km30 km60 km120 km N Vega Baja Municipio 6 kmVega Alta Municipio 11 kmManatí Municipio 11 kmDorado Municipio 16 kmBarceloneta Municipio 16 kmMorovis Municipio 21 kmFlorida Municipio 22 kmToa Baja Municipio 23 kmToa Alta Municipio 23 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
108 km below the surface
Felt
no reports yet
Nearest
Vega Baja Municipio, 6 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3079 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 1,200 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 6.7 280,000× 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 8,800× 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 1.3× 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 18.5071, -66.4085. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Vega Baja Municipio, PR 6 km (4 mi) N of here earthquakes near Vega Baja Municipio
Vega Alta Municipio, PR 11 km (7 mi) NW of here earthquakes near Vega Alta Municipio
Manatí Municipio, PR 11 km (7 mi) NE of here earthquakes near Manatí Municipio
Dorado Municipio, PR 16 km (10 mi) WNW of here earthquakes near Dorado Municipio
Barceloneta Municipio, PR 16 km (10 mi) ENE of here earthquakes near Barceloneta Municipio
Morovis Municipio, PR 21 km (13 mi) N of here earthquakes near Morovis Municipio

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

Aftershocks so far

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

  1. 2.3 8 km NNE of Jayuya, Puerto Rico
  2. 2.0 6 km NE of Comerío, Puerto Rico
  3. 2.3 2 km SSW of Bayamón, Puerto Rico
  4. 2.6 Puerto Rico region
  5. 2.5 12 km NNE of Brenas, Puerto Rico
  6. 1.9 9 km NNW of Garrochales, Puerto Rico
  7. 2.8 2 km NW of Dorado, Puerto Rico
  8. 2.8 4 km N of Barceloneta, Puerto Rico
  9. 2.6 29 km N of Hatillo, Puerto Rico
  10. 2.6 6 km NE of Comerío, Puerto Rico
  11. 2.5 0 km ENE of San Juan, Puerto Rico
  12. 2.0 1 km E of Parcelas Nuevas, Puerto Rico
  13. 2.2 5 km NNW of Levittown, Puerto Rico
  14. 2.2 3 km NNW of Orocovis, Puerto Rico
  15. 2.5 4 km NNW of Arecibo, 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 4.8 on 2017-08-18 — it released about 390 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.