QuakeIndex

Earthquake · reviewed by a seismologist

M 2.9md

13 km N of Brenas, Puerto Rico

· 29 km deep · released about 780 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Dorado Municipio 15 kmVega Baja Municipio 16 kmVega Alta Municipio 17 kmToa Baja Municipio 21 kmManatí Municipio 23 kmCataño Municipio 26 kmBarceloneta Municipio 27 kmToa Alta Municipio 27 kmMorovis Municipio 31 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
29 km below the surface
Felt
1 report · strongest reported intensity III
Nearest
Dorado Municipio, 15 km SSE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1678 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 1 person has reported feeling it to USGS.

How big was it?

This earthquake released about 780 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 19,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 14,000× the energy of this one
  3. Around the size people start to feel M 3.0 1.2× the energy of this one
  4. This earthquake M 2.9 about 780 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 18.5872, -66.3393. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Dorado Municipio, PR 15 km (9 mi) NNW of here earthquakes near Dorado Municipio
Vega Baja Municipio, PR 16 km (10 mi) NNE of here earthquakes near Vega Baja Municipio
Vega Alta Municipio, PR 17 km (10 mi) N of here earthquakes near Vega Alta Municipio
Toa Baja Municipio, PR 21 km (13 mi) NW of here earthquakes near Toa Baja Municipio
Manatí Municipio, PR 23 km (14 mi) NE of here earthquakes near Manatí Municipio
Cataño Municipio, PR 26 km (16 mi) NW of here earthquakes near Cataño Municipio

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

Aftershocks so far

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

  1. 2.9 1 km WNW of Río Lajas, Puerto Rico
  2. 3.0 5 km N of Levittown, Puerto Rico
  3. 2.0 Puerto Rico region
  4. 2.3 Puerto Rico region
  5. 2.8 20 km N of Tierras Nuevas Poniente, Puerto Rico
  6. 2.7 5 km NW of Orocovis, Puerto Rico
  7. 3.1 1 km NNW of Campanilla, Puerto Rico
  8. 3.1 2 km NW of Cataño, Puerto Rico
  9. 2.8 30 km N of Tierras Nuevas Poniente, Puerto Rico
  10. 2.6 5 km ESE of Naranjito, Puerto Rico
  11. 3.4 26 km N of Tierras Nuevas Poniente, Puerto Rico
  12. 3.0 30 km N of Tierras Nuevas Poniente, Puerto Rico
  13. 2.4 4 km NNE of Aibonito, Puerto Rico
  14. 3.6 0 km E of Sabana Seca, Puerto Rico
  15. 2.7 29 km N of Garrochales, 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 620 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.