QuakeIndex

Earthquake · reviewed by a seismologist

M 2.9md

Puerto Rico region

· 74 km deep · released about 750 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Dorado Municipio 10 kmVega Alta Municipio 12 kmVega Baja Municipio 13 kmToa Baja Municipio 16 kmCataño Municipio 21 kmManatí Municipio 21 kmToa Alta Municipio 21 kmBarceloneta Municipio 26 kmCorozal Municipio 26 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
74 km below the surface
Felt
no reports yet
Nearest
Dorado Municipio, 10 km SE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1412 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 750 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 20,000× 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 1.3× the energy of this one
  4. This earthquake M 2.9 about 750 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 18.5408, -66.3203. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Dorado Municipio, PR 10 km (6 mi) NW of here earthquakes near Dorado Municipio
Vega Alta Municipio, PR 12 km (7 mi) N of here earthquakes near Vega Alta Municipio
Vega Baja Municipio, PR 13 km (8 mi) NE of here earthquakes near Vega Baja Municipio
Toa Baja Municipio, PR 16 km (10 mi) NW of here earthquakes near Toa Baja Municipio
Cataño Municipio, PR 21 km (13 mi) WNW of here earthquakes near Cataño Municipio
Manatí Municipio, PR 21 km (13 mi) ENE of here earthquakes near Manatí Municipio

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

Aftershocks so far

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

  1. 2.8 0 km SSW of San Juan, Puerto Rico
  2. 2.5 20 km NNW of Brenas, Puerto Rico
  3. 2.1 6 km NE of Orocovis, Puerto Rico
  4. 2.7 2 km WNW of Campo Rico, Puerto Rico
  5. 2.8 10 km NNE of Carrizales, Puerto Rico
  6. 3.5 12 km NNE of Arecibo, Puerto Rico
  7. 2.8 45 km N of San Juan, Puerto Rico
  8. 2.8 1 km W of San Isidro, Puerto Rico
  9. 3.2 3 km NNW of San Juan, Puerto Rico
  10. 3.1 5 km N of Garrochales, Puerto Rico
  11. 2.7 Puerto Rico region
  12. 3.4 Puerto Rico region
  13. 2.8 44 km N of San Juan, Puerto Rico
  14. 3.7 Puerto Rico region
  15. 2.9 Puerto Rico region

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 640 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.