QuakeIndex

Earthquake · reviewed by a seismologist

M 3.3md

7 km NNE of Dorado, Puerto Rico

· 92 km deep · released about 1.2 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Dorado Municipio 5 kmToa Baja Municipio 8 kmCataño Municipio 12 kmVega Alta Municipio 14 kmToa Alta Municipio 17 kmVega Baja Municipio 19 kmBayamón Municipio 20 kmSan Juan Municipio 20 kmGuaynabo Municipio 23 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 3.3 (md)
Depth
92 km below the surface
Felt
1 report · strongest reported intensity II
Nearest
Dorado Municipio, 5 km SW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1225 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 1.2 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.3 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 140,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 6,200× the energy of this one
  3. Magna, Utah 2020 M 5.7 4,400× the energy of this one
  4. This earthquake M 3.3 about 1.2 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 2.5× more

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 18.5145, -66.2333. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Dorado Municipio, PR 5 km (3 mi) NE of here earthquakes near Dorado Municipio
Toa Baja Municipio, PR 8 km (5 mi) NNW of here earthquakes near Toa Baja Municipio
Cataño Municipio, PR 12 km (7 mi) NW of here earthquakes near Cataño Municipio
Vega Alta Municipio, PR 14 km (9 mi) NE of here earthquakes near Vega Alta Municipio
Toa Alta Municipio, PR 17 km (10 mi) N of here earthquakes near Toa Alta Municipio
Vega Baja Municipio, PR 19 km (12 mi) ENE of here earthquakes near Vega Baja Municipio

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

Aftershocks so far

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

  1. 1.9 8 km ENE of Villalba, Puerto Rico
  2. 2.1 Puerto Rico region
  3. 2.8 5 km NNW of Brenas, Puerto Rico
  4. 2.6 2 km WNW of Bayamon, Puerto Rico
  5. 2.9 2 km NNE of Parcelas La Milagrosa, Puerto Rico
  6. 2.7 1 km W of Juncos, Puerto Rico
  7. 3.0 56 km N of Dorado, Puerto Rico
  8. 3.0 Puerto Rico region
  9. 3.2 6 km N of San Juan, Puerto Rico
  10. 3.0 Puerto Rico region
  11. 3.0 18 km NNE of Arecibo, Puerto Rico
  12. 3.6 0 km ENE of Pájaros, Puerto Rico
  13. 2.6 8 km SSW of Ciales, Puerto Rico
  14. 2.8 19 km N of Garrochales, Puerto Rico
  15. 3.3 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 200 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.