QuakeIndex

Earthquake · reviewed by a seismologist

M 2.9md

46 km N of Brenas, Puerto Rico

· 32 km deep · released about 570 lb of TNT

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10 km30 km60 km120 km N Dorado Municipio 46 kmVega Baja Municipio 48 kmToa Baja Municipio 49 kmVega Alta Municipio 50 kmCataño Municipio 51 kmManatí Municipio 52 kmBarceloneta Municipio 53 kmSan Juan Municipio 57 kmToa Alta Municipio 58 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
32 km below the surface
Felt
no reports yet
Nearest
Dorado Municipio, 46 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 251 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 570 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 27,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 19,000× the energy of this one
  3. Around the size people start to feel M 3.0 1.7× the energy of this one
  4. This earthquake M 2.9 about 570 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 18.8817, -66.3092. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Dorado Municipio, PR 46 km (28 mi) N of here earthquakes near Dorado Municipio
Vega Baja Municipio, PR 48 km (30 mi) N of here earthquakes near Vega Baja Municipio
Toa Baja Municipio, PR 49 km (30 mi) NNW of here earthquakes near Toa Baja Municipio
Vega Alta Municipio, PR 50 km (31 mi) N of here earthquakes near Vega Alta Municipio
Cataño Municipio, PR 51 km (32 mi) NNW of here earthquakes near Cataño Municipio
Manatí Municipio, PR 52 km (32 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. 2.7 15 km N of San Juan, Puerto Rico
  2. 3.1 55 km NNE of San Juan, Puerto Rico
  3. 3.0 60 km N of Loíza, Puerto Rico
  4. 3.2 10 km NNE of Brenas, Puerto Rico
  5. 3.4 8 km NNE of Brenas, Puerto Rico
  6. 3.2 75 km N of Brenas, Puerto Rico
  7. 3.1 13 km N of Garrochales, Puerto Rico
  8. 2.9 77 km N of Brenas, Puerto Rico
  9. 3.2 71 km N of Brenas, Puerto Rico
  10. 2.7 75 km N of Brenas, Puerto Rico
  11. 3.3 71 km N of Brenas, Puerto Rico
  12. 3.2 74 km N of San Juan, Puerto Rico
  13. 3.2 43 km N of Carrizales, Puerto Rico
  14. 3.0 42 km N of Carrizales, Puerto Rico
  15. 3.1 40 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 840 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.