QuakeIndex

Earthquake · reviewed by a seismologist

M 3.3md

15 km NNW of Brenas, Puerto Rico

· 70 km deep · released about 1.4 tons of TNT

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10 km30 km60 km120 km N Vega Baja Municipio 16 kmDorado Municipio 18 kmVega Alta Municipio 19 kmManatí Municipio 21 kmBarceloneta Municipio 24 kmToa Baja Municipio 25 kmCataño Municipio 30 kmToa Alta Municipio 30 kmMorovis Municipio 32 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 3.3 (md)
Depth
70 km below the surface
Felt
no reports yet
Nearest
Vega Baja Municipio, 16 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1338 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 1.4 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.3 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 120,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 5,400× the energy of this one
  3. Magna, Utah 2020 M 5.7 3,800× the energy of this one
  4. This earthquake M 3.3 about 1.4 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 2.9× 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 18.5998, -66.3763. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Vega Baja Municipio, PR 16 km (10 mi) N of here earthquakes near Vega Baja Municipio
Dorado Municipio, PR 18 km (11 mi) NW of here earthquakes near Dorado Municipio
Vega Alta Municipio, PR 19 km (12 mi) NNW of here earthquakes near Vega Alta Municipio
Manatí Municipio, PR 21 km (13 mi) NE of here earthquakes near Manatí Municipio
Barceloneta Municipio, PR 24 km (15 mi) NE of here earthquakes near Barceloneta Municipio
Toa Baja Municipio, PR 25 km (16 mi) NW 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

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

  1. 3.0 55 km N of Tierras Nuevas Poniente, Puerto Rico
  2. 3.0 27 km N of Hatillo, Puerto Rico
  3. 2.8 45 km N of San Juan, Puerto Rico
  4. 2.9 Puerto Rico region
  5. 3.2 3 km NNW of San Juan, Puerto Rico
  6. 3.1 5 km N of Garrochales, Puerto Rico
  7. 2.7 Puerto Rico region
  8. 3.3 47 km N of Arecibo, Puerto Rico
  9. 2.8 44 km N of San Juan, Puerto Rico
  10. 3.6 11 km NNE of Hatillo, Puerto Rico
  11. 3.7 Puerto Rico region
  12. 2.9 Puerto Rico region
  13. 2.2 3 km ENE of Carrizales, Puerto Rico
  14. 2.6 2 km NNE of Orocovis, Puerto Rico
  15. 2.6 24 km NNE of Dorado, 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 170 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.