QuakeIndex

Earthquake · reviewed by a seismologist

M 3.1Md

6 km NNW of Vega Baja, Puerto Rico

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

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10 km30 km60 km120 km N Vega Baja Municipio 4 kmManatí Municipio 10 kmVega Alta Municipio 10 kmBarceloneta Municipio 15 kmDorado Municipio 16 kmMorovis Municipio 19 kmFlorida Municipio 20 kmCorozal 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, 4 km SSE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3707 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 6.7 250,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 11,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 7,900× 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 18.4908, -66.4172. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Vega Baja Municipio, PR 4 km (3 mi) NNW of here earthquakes near Vega Baja Municipio
Manatí Municipio, PR 10 km (6 mi) ENE of here earthquakes near Manatí Municipio
Vega Alta Municipio, PR 10 km (7 mi) NW of here earthquakes near Vega Alta Municipio
Barceloneta Municipio, PR 15 km (9 mi) E of here earthquakes near Barceloneta Municipio
Dorado Municipio, PR 16 km (10 mi) W of here earthquakes near Dorado Municipio
Morovis Municipio, PR 19 km (12 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

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

  1. 2.1 8 km E of Jayuya, Puerto Rico
  2. 1.9 3 km SSE of Villalba, Puerto Rico
  3. 3.3 8 km NNE of Brenas, Puerto Rico
  4. 2.5 0 km S of Tierras Nuevas Poniente, Puerto Rico
  5. 2.4 17 km N of Carrizales, Puerto Rico
  6. 3.0 4 km E of Rafael Gonzalez, Puerto Rico
  7. 3.7 6 km NE of Carrizales, Puerto Rico
  8. 2.7 0 km SSW of Miranda, Puerto Rico
  9. 2.2 5 km WNW of Palomas, Puerto Rico
  10. 2.6 10 km NNW of San Juan, Puerto Rico
  11. 2.7 1 km ESE of Ceiba, Puerto Rico
  12. 2.3 3 km N of Orocovis, Puerto Rico
  13. 2.7 13 km NNE of Carrizales, Puerto Rico
  14. 2.2 12 km N of Carrizales, Puerto Rico
  15. 2.7 5 km S of Trujillo Alto, 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.