QuakeIndex

Earthquake · reviewed by a seismologist

M 3.0md

2 km E of Vega Alta, Puerto Rico

· 59 km deep · released about 800 lb of TNT

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10 km30 km60 km120 km N Vega Alta Municipio 4 kmDorado Municipio 8 kmToa Alta Municipio 9 kmVega Baja Municipio 10 kmCorozal Municipio 12 kmToa Baja Municipio 13 kmNaranjito Municipio 15 kmMorovis Municipio 16 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
59 km below the surface
Felt
no reports yet
Nearest
Vega Alta Municipio, 4 km NW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 833 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 800 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 6.7 420,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 19,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 13,000× the energy of this one
  4. This earthquake M 3.0 about 800 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 18.4138, -66.3100. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Vega Alta Municipio, PR 4 km (2 mi) SE of here earthquakes near Vega Alta Municipio
Dorado Municipio, PR 8 km (5 mi) SW of here earthquakes near Dorado Municipio
Toa Alta Municipio, PR 9 km (5 mi) NW of here earthquakes near Toa Alta Municipio
Vega Baja Municipio, PR 10 km (6 mi) ESE of here earthquakes near Vega Baja Municipio
Corozal Municipio, PR 12 km (8 mi) N of here earthquakes near Corozal Municipio
Toa Baja Municipio, PR 13 km (8 mi) WSW of here earthquakes near Toa Baja Municipio

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

Aftershocks so far

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

  1. 2.7 3 km WNW of Orocovis, Puerto Rico
  2. 2.5 4 km NW of Orocovis, Puerto Rico
  3. 2.6 3 km NW of Orocovis, Puerto Rico
  4. 2.0 6 km W of Orocovis, Puerto Rico
  5. 2.6 29 km N of Brenas, Puerto Rico
  6. 2.8 20 km N of Tierras Nuevas Poniente, Puerto Rico
  7. 2.5 3 km SW of G. L. Garcia, Puerto Rico
  8. 3.4 6 km NNW of Vega Baja, Puerto Rico
  9. 2.6 4 km WNW of Orocovis, Puerto Rico
  10. 3.3 6 km WSW of Estancias de Florida, Puerto Rico
  11. 3.0 37 km N of Dorado, Puerto Rico
  12. 2.7 30 km N of Brenas, Puerto Rico
  13. 2.9 24 km N of Garrochales, Puerto Rico
  14. 3.0 1 km NNE of Manatí, Puerto Rico
  15. 2.3 3 km WNW of Orocovis, 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 150 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.