QuakeIndex

Earthquake · reviewed by a seismologist

M 2.9md

15 km NNE of Brenas, Puerto Rico

· 82 km deep · released about 630 lb of TNT

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10 km30 km60 km120 km N Dorado Municipio 15 kmVega Alta Municipio 19 kmVega Baja Municipio 19 kmToa Baja Municipio 20 kmCataño Municipio 24 kmManatí Municipio 27 kmToa Alta Municipio 27 kmBarceloneta Municipio 31 kmBayamón 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 2.9 (md)
Depth
82 km below the surface
Felt
no reports yet
Nearest
Dorado Municipio, 15 km SSE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3211 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 630 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 24,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 17,000× the energy of this one
  3. Around the size people start to feel M 3.0 1.5× the energy of this one
  4. This earthquake M 2.9 about 630 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 18.6030, -66.3050. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Dorado Municipio, PR 15 km (9 mi) NNW of here earthquakes near Dorado Municipio
Vega Alta Municipio, PR 19 km (12 mi) N of here earthquakes near Vega Alta Municipio
Vega Baja Municipio, PR 19 km (12 mi) NNE of here earthquakes near Vega Baja Municipio
Toa Baja Municipio, PR 20 km (12 mi) NW of here earthquakes near Toa Baja Municipio
Cataño Municipio, PR 24 km (15 mi) NW of here earthquakes near Cataño Municipio
Manatí Municipio, PR 27 km (16 mi) NE of here earthquakes near Manatí Municipio

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

Aftershocks so far

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

  1. 2.9 2 km WNW of Vega Baja, Puerto Rico
  2. 2.6 Puerto Rico region
  3. 3.1 8 km NNW of Arecibo, Puerto Rico
  4. 3.1 18 km NNW of Brenas, Puerto Rico
  5. 3.2 40 km N of Arecibo, Puerto Rico
  6. 2.9 53 km NNW of San Juan, Puerto Rico
  7. 2.3 33 km N of Arecibo, Puerto Rico
  8. 2.0 3 km SSE of Carolina, Puerto Rico
  9. 3.2 41 km N of Brenas, Puerto Rico
  10. 2.7 26 km NNW of Brenas, Puerto Rico
  11. 3.2 57 km N of San Juan, Puerto Rico
  12. 2.9 1 km WSW of Cataño, Puerto Rico
  13. 2.6 5 km N of Brenas, Puerto Rico
  14. 1.9 8 km NNE of Animas, Puerto Rico
  15. 2.6 58 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 4.8 on 2017-08-18 — it released about 760 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.