QuakeIndex

Earthquake · reviewed by a seismologist

M 2.9Md

42 km N of Brenas, Puerto Rico

· 42 km deep · released about 680 lb of TNT

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10 km30 km60 km120 km N Dorado Municipio 41 kmVega Baja Municipio 45 kmToa Baja Municipio 45 kmVega Alta Municipio 46 kmCataño Municipio 47 kmManatí Municipio 49 kmBarceloneta Municipio 50 kmSan Juan Municipio 53 kmToa Alta Municipio 54 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 2.9 (Md)
Depth
42 km below the surface
Felt
no reports yet
Nearest
Dorado Municipio, 41 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3500 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 680 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 22,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 16,000× the energy of this one
  3. Around the size people start to feel M 3.0 1.4× the energy of this one
  4. This earthquake M 2.9 about 680 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 18.8451, -66.3001. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Dorado Municipio, PR 41 km (26 mi) N of here earthquakes near Dorado Municipio
Vega Baja Municipio, PR 45 km (28 mi) NNE of here earthquakes near Vega Baja Municipio
Toa Baja Municipio, PR 45 km (28 mi) NNW of here earthquakes near Toa Baja Municipio
Vega Alta Municipio, PR 46 km (28 mi) N of here earthquakes near Vega Alta Municipio
Cataño Municipio, PR 47 km (29 mi) NNW of here earthquakes near Cataño Municipio
Manatí Municipio, PR 49 km (30 mi) NNE of here earthquakes near Manatí Municipio

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

Aftershocks so far

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

  1. 3.0 Puerto Rico region
  2. 2.2 Puerto Rico region
  3. 2.8 70 km N of Tierras Nuevas Poniente, Puerto Rico
  4. 2.6 6 km ENE of Tierras Nuevas Poniente, Puerto Rico
  5. 2.8 10 km NNE of Dorado, Puerto Rico
  6. 2.9 47 km NNE of San Juan, Puerto Rico
  7. 3.0 83 km N of San Juan, Puerto Rico
  8. 2.7 10 km N of Brenas, Puerto Rico
  9. 2.9 8 km ENE of San Juan, Puerto Rico
  10. 2.7 14 km NNE of Arecibo, Puerto Rico
  11. 2.6 11 km NNW of Tierras Nuevas Poniente, Puerto Rico
  12. 2.7 74 km N of San Juan, Puerto Rico
  13. 3.1 1 km SE of Ceiba, Puerto Rico
  14. 3.1 82 km N of Tierras Nuevas Poniente, Puerto Rico
  15. 3.0 80 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.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.