QuakeIndex

Earthquake · reviewed by a seismologist

M 3.3md

4 km NE of Brenas, Puerto Rico

· 103 km deep · released about 1.5 tons of TNT

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10 km30 km60 km120 km N Dorado Municipio 6 kmVega Alta Municipio 8 kmVega Baja Municipio 10 kmToa Baja Municipio 14 kmToa Alta Municipio 17 kmCataño Municipio 18 kmManatí Municipio 20 kmCorozal Municipio 22 kmBayamón 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 3.3 (md)
Depth
103 km below the surface
Felt
no reports yet
Nearest
Dorado Municipio, 6 km ESE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3116 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 1.5 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 6.7 110,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 5,100× the energy of this one
  3. Magna, Utah 2020 M 5.7 3,600× the energy of this one
  4. This earthquake M 3.3 about 1.5 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 3.1× 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 18.5003, -66.3136. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Dorado Municipio, PR 6 km (4 mi) WNW of here earthquakes near Dorado Municipio
Vega Alta Municipio, PR 8 km (5 mi) NNE of here earthquakes near Vega Alta Municipio
Vega Baja Municipio, PR 10 km (6 mi) ENE of here earthquakes near Vega Baja Municipio
Toa Baja Municipio, PR 14 km (8 mi) WNW of here earthquakes near Toa Baja Municipio
Toa Alta Municipio, PR 17 km (10 mi) NNW of here earthquakes near Toa Alta Municipio
Cataño Municipio, PR 18 km (11 mi) WNW of here earthquakes near Cataño Municipio

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

Aftershocks so far

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

  1. 2.7 Puerto Rico region
  2. 3.0 1 km N of Ingenio, Puerto Rico
  3. 3.3 1 km SE of Sumidero, Puerto Rico
  4. 2.9 4 km SE of Cataño, Puerto Rico
  5. 2.6 19 km NNE of Arecibo, Puerto Rico
  6. 2.8 40 km N of Tierras Nuevas Poniente, Puerto Rico
  7. 2.7 4 km WNW of San Juan, Puerto Rico
  8. 2.7 28 km NNW of Brenas, Puerto Rico
  9. 2.4 7 km NNE of Garrochales, Puerto Rico
  10. 2.5 23 km NNW of Tierras Nuevas Poniente, Puerto Rico
  11. 1.9 7 km WSW of Orocovis, Puerto Rico
  12. 2.7 18 km NNE of Carrizales, Puerto Rico
  13. 2.6 37 km N of Tierras Nuevas Poniente, Puerto Rico
  14. 2.8 41 km N of Brenas, Puerto Rico
  15. 3.2 6 km ENE of Jayuya, 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 160 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.