QuakeIndex

Earthquake · reviewed by a seismologist

M 2.8md

10 km N of Brenas, Puerto Rico

· 22 km deep · released about 510 lb of TNT

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10 km30 km60 km120 km N Dorado Municipio 13 kmVega Baja Municipio 13 kmVega Alta Municipio 14 kmToa Baja Municipio 19 kmManatí Municipio 20 kmToa Alta Municipio 24 kmCataño Municipio 24 kmBarceloneta Municipio 25 kmMorovis Municipio 28 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 2.8 (md)
Depth
22 km below the surface
Felt
no reports yet
Nearest
Dorado Municipio, 13 km SE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 239 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 510 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 30,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 21,000× the energy of this one
  3. Around the size people start to feel M 3.0 1.9× the energy of this one
  4. This earthquake M 2.8 about 510 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 18.5582, -66.3428. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Dorado Municipio, PR 13 km (8 mi) NW of here earthquakes near Dorado Municipio
Vega Baja Municipio, PR 13 km (8 mi) NNE of here earthquakes near Vega Baja Municipio
Vega Alta Municipio, PR 14 km (8 mi) N of here earthquakes near Vega Alta Municipio
Toa Baja Municipio, PR 19 km (12 mi) NW of here earthquakes near Toa Baja Municipio
Manatí Municipio, PR 20 km (13 mi) NE of here earthquakes near Manatí Municipio
Toa Alta Municipio, PR 24 km (15 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. 2.7 15 km N of San Juan, Puerto Rico
  2. 2.1 7 km WSW of Naranjito, Puerto Rico
  3. 2.5 16 km N of Arecibo, Puerto Rico
  4. 2.0 2 km ENE of Aguas Buenas, Puerto Rico
  5. 3.2 10 km NNE of Brenas, Puerto Rico
  6. 3.4 8 km NNE of Brenas, Puerto Rico
  7. 1.9 1 km SSW of Candelaria Arenas, Puerto Rico
  8. 3.1 3 km ESE of San Juan, Puerto Rico
  9. 2.7 13 km N of Carrizales, Puerto Rico
  10. 2.5 5 km N of Coamo, Puerto Rico
  11. 2.0 1 km SSW of Animas, Puerto Rico
  12. 3.1 13 km N of Garrochales, Puerto Rico
  13. 4.2 2 km SW of Río Lajas, Puerto Rico
  14. 3.1 40 km N of Tierras Nuevas Poniente, Puerto Rico
  15. 2.9 24 km N of Arecibo, 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 930 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.