QuakeIndex

Earthquake · reviewed by a seismologist

M 3.0md

3 km SW of Vega Alta, Puerto Rico

· 56 km deep · released about 1,100 lb of TNT

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10 km30 km60 km120 km N Vega Alta Municipio 5 kmVega Baja Municipio 8 kmCorozal Municipio 10 kmMorovis Municipio 11 kmToa Alta Municipio 12 kmDorado Municipio 13 kmNaranjito Municipio 16 kmManatí Municipio 16 kmToa Baja 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 3.0 (md)
Depth
56 km below the surface
Felt
1 report · strongest reported intensity I
Nearest
Vega Alta Municipio, 5 km NNE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 301 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 1 person has reported feeling it to USGS.

How big was it?

This earthquake released about 1,100 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 6.7 300,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 13,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 9,400× the energy of this one
  4. This earthquake M 3.0 about 1,100 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 18.3932, -66.3537. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Vega Alta Municipio, PR 5 km (3 mi) SSW of here earthquakes near Vega Alta Municipio
Vega Baja Municipio, PR 8 km (5 mi) SE of here earthquakes near Vega Baja Municipio
Corozal Municipio, PR 10 km (6 mi) NNW of here earthquakes near Corozal Municipio
Morovis Municipio, PR 11 km (7 mi) NE of here earthquakes near Morovis Municipio
Toa Alta Municipio, PR 12 km (7 mi) WNW of here earthquakes near Toa Alta Municipio
Dorado Municipio, PR 13 km (8 mi) SW of here earthquakes near Dorado Municipio

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

Aftershocks so far

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

  1. 3.2 23 km NNW of Brenas, Puerto Rico
  2. 2.8 35 km N of Garrochales, Puerto Rico
  3. 3.3 1 km S of Pájaros, Puerto Rico
  4. 2.9 1 km WSW of Bayamon, Puerto Rico
  5. 3.0 4 km NNW of Dorado, Puerto Rico
  6. 2.1 1 km NE of Las Ochenta, Puerto Rico
  7. 2.1 1 km SSW of Adjuntas, Puerto Rico
  8. 2.2 5 km NW of Orocovis, Puerto Rico
  9. 1.5 1 km SE of Salinas, Puerto Rico
  10. 2.9 2 km S of Cayey, Puerto Rico
  11. 1.9 2 km SE of Cidra, Puerto Rico
  12. 2.4 2 km WNW of Arecibo, Puerto Rico
  13. 3.0 31 km N of Tierras Nuevas Poniente, 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 110 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.