QuakeIndex

Earthquake · reviewed by a seismologist

M 3.3md

35 km N of Brenas, Puerto Rico

· 53 km deep · released about 1.4 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Dorado Municipio 37 kmVega Baja Municipio 37 kmVega Alta Municipio 39 kmManatí Municipio 40 kmBarceloneta Municipio 40 kmToa Baja Municipio 41 kmCataño Municipio 45 kmToa Alta Municipio 49 kmArecibo Municipio 50 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
53 km below the surface
Felt
no reports yet
Nearest
Dorado Municipio, 37 km SSE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 27 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 1.4 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 6.7 120,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 5,200× the energy of this one
  3. Magna, Utah 2020 M 5.7 3,700× the energy of this one
  4. This earthquake M 3.3 about 1.4 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 3× 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 18.7857, -66.3723. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Dorado Municipio, PR 37 km (23 mi) NNW of here earthquakes near Dorado Municipio
Vega Baja Municipio, PR 37 km (23 mi) N of here earthquakes near Vega Baja Municipio
Vega Alta Municipio, PR 39 km (24 mi) N of here earthquakes near Vega Alta Municipio
Manatí Municipio, PR 40 km (25 mi) NNE of here earthquakes near Manatí Municipio
Barceloneta Municipio, PR 40 km (25 mi) NNE of here earthquakes near Barceloneta Municipio
Toa Baja Municipio, PR 41 km (26 mi) NNW of here earthquakes near Toa Baja Municipio

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

Aftershocks so far

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

  1. 2.8 8 km NNE of Tierras Nuevas Poniente, Puerto Rico
  2. 2.8 13 km NNE of Carrizales, Puerto Rico
  3. 3.1 75 km N of Brenas, Puerto Rico
  4. 3.0 15 km N of Arecibo, Puerto Rico
  5. 2.9 65 km N of Tierras Nuevas Poniente, Puerto Rico
  6. 2.8 43 km NNE of Arecibo, Puerto Rico
  7. 2.8 10 km NNE of Tierras Nuevas Poniente, Puerto Rico
  8. 2.6 5 km N of Animas, Puerto Rico
  9. 3.1 36 km NNE of Arecibo, Puerto Rico
  10. 2.4 19 km NNE of Arecibo, Puerto Rico
  11. 2.3 4 km N of Brenas, Puerto Rico
  12. 2.9 7 km NNE of Brenas, Puerto Rico
  13. 3.1 57 km N of Hatillo, Puerto Rico
  14. 3.1 63 km N of San Juan, Puerto Rico
  15. 2.7 14 km N of Carrizales, 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 170 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.