QuakeIndex

Earthquake · reviewed by a seismologist

M 3.0Md

1 km SE of Vega Alta, Puerto Rico

· 93 km deep · released about 950 lb of TNT

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10 km30 km60 km120 km N Vega Alta Municipio 4 kmToa Alta Municipio 9 kmVega Baja Municipio 10 kmDorado Municipio 10 kmCorozal Municipio 11 kmMorovis Municipio 14 kmNaranjito Municipio 14 kmToa Baja Municipio 15 kmBayamón Municipio 17 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 3.0 (Md)
Depth
93 km below the surface
Felt
no reports yet
Nearest
Vega Alta Municipio, 4 km NNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3590 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 950 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.0 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 350,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 16,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 11,000× the energy of this one
  4. This earthquake M 3.0 about 950 lb of TNT

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 18.3987, -66.3212. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Vega Alta Municipio, PR 4 km (3 mi) SSE of here earthquakes near Vega Alta Municipio
Toa Alta Municipio, PR 9 km (6 mi) WNW of here earthquakes near Toa Alta Municipio
Vega Baja Municipio, PR 10 km (6 mi) SE of here earthquakes near Vega Baja Municipio
Dorado Municipio, PR 10 km (7 mi) SW of here earthquakes near Dorado Municipio
Corozal Municipio, PR 11 km (7 mi) N of here earthquakes near Corozal Municipio
Morovis Municipio, PR 14 km (9 mi) NE of here earthquakes near Morovis Municipio

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

Aftershocks so far

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

  1. 3.0 1 km S of Campanilla, Puerto Rico
  2. 1.7 1 km SE of Jayuya, Puerto Rico
  3. 2.8 25 km NNE of Arecibo, Puerto Rico
  4. 2.7 15 km N of Garrochales, Puerto Rico
  5. 1.9 5 km N of Suárez, Puerto Rico
  6. 2.7 13 km N of Arecibo, Puerto Rico
  7. 2.2 2 km E of Potala Pastillo, Puerto Rico
  8. 2.2 1 km SW of Salinas, Puerto Rico
  9. 2.4 4 km ESE of Villalba, Puerto Rico
  10. 2.7 1 km WNW of Potala Pastillo, Puerto Rico
  11. 2.7 10 km NNE of Arecibo, Puerto Rico
  12. 2.4 3 km NNW of Jagual, Puerto Rico
  13. 2.5 7 km NNW of Trujillo Alto, Puerto Rico
  14. 3.0 5 km SE of Pájaros, Puerto Rico
  15. 2.6 4 km S of G. L. Garcia, 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.