QuakeIndex

Earthquake · reviewed by a seismologist

M 3.3Md

8 km NNE of Brenas, Puerto Rico

· 97 km deep · released about 1.3 tons of TNT

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10 km30 km60 km120 km N Dorado Municipio 8 kmVega Alta Municipio 11 kmVega Baja Municipio 13 kmToa Baja Municipio 14 kmCataño Municipio 19 kmToa Alta Municipio 20 kmManatí Municipio 22 kmBayamón Municipio 25 kmCorozal Municipio 25 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
97 km below the surface
Felt
no reports yet
Nearest
Dorado Municipio, 8 km SSE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3672 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 1.3 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 6.7 130,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 5,600× the energy of this one
  3. Magna, Utah 2020 M 5.7 4,000× the energy of this one
  4. This earthquake M 3.3 about 1.3 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 2.8× 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 18.5317, -66.3021. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Dorado Municipio, PR 8 km (5 mi) NNW of here earthquakes near Dorado Municipio
Vega Alta Municipio, PR 11 km (7 mi) NNE of here earthquakes near Vega Alta Municipio
Vega Baja Municipio, PR 13 km (8 mi) NE of here earthquakes near Vega Baja Municipio
Toa Baja Municipio, PR 14 km (9 mi) NW of here earthquakes near Toa Baja Municipio
Cataño Municipio, PR 19 km (12 mi) WNW of here earthquakes near Cataño Municipio
Toa Alta Municipio, PR 20 km (12 mi) NNW of here earthquakes near Toa Alta Municipio

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

Aftershocks so far

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

  1. 2.4 3 km NNW of Jagual, Puerto Rico
  2. 2.5 7 km NNW of Trujillo Alto, Puerto Rico
  3. 3.0 5 km SE of Pájaros, Puerto Rico
  4. 2.5 25 km N of Loíza, Puerto Rico
  5. 3.9 6 km WNW of Aguas Buenas, Puerto Rico
  6. 2.9 26 km N of Loíza, Puerto Rico
  7. 2.7 9 km N of Animas, Puerto Rico
  8. 2.5 30 km NNE of Arecibo, Puerto Rico
  9. 2.8 3 km NW of Orocovis, Puerto Rico
  10. 2.3 17 km NNE of Carrizales, Puerto Rico
  11. 2.2 41 km N of San Juan, Puerto Rico
  12. 3.0 5 km ESE of Naranjito, Puerto Rico
  13. 2.9 9 km NE of Arecibo, Puerto Rico
  14. 2.0 3 km SW of Caguas, Puerto Rico
  15. 2.6 16 km NNE of Carrizales, 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.