QuakeIndex

Earthquake · reviewed by a seismologist

M 3.3md

Puerto Rico region

· 37 km deep · released about 1.3 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Vega Baja Municipio 27 kmBarceloneta Municipio 27 kmManatí Municipio 28 kmVega Alta Municipio 31 kmDorado Municipio 32 kmArecibo Municipio 37 kmFlorida Municipio 38 kmToa Baja Municipio 38 kmMorovis Municipio 42 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
37 km below the surface
Felt
2 reports · strongest reported intensity II
Nearest
Vega Baja Municipio, 27 km SSE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1170 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 2 people have reported feeling it to USGS.

How big was it?

This earthquake released about 1.3 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 6.7 130,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 5,600× the energy of this one
  3. Magna, Utah 2020 M 5.7 4,000× the energy of this one
  4. This earthquake M 3.3 about 1.3 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 2.8× 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 18.6925, -66.4543. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Vega Baja Municipio, PR 27 km (17 mi) NNW of here earthquakes near Vega Baja Municipio
Barceloneta Municipio, PR 27 km (17 mi) NNE of here earthquakes near Barceloneta Municipio
Manatí Municipio, PR 28 km (17 mi) N of here earthquakes near Manatí Municipio
Vega Alta Municipio, PR 31 km (19 mi) NNW of here earthquakes near Vega Alta Municipio
Dorado Municipio, PR 32 km (20 mi) NW of here earthquakes near Dorado Municipio
Arecibo Municipio, PR 37 km (23 mi) NE of here earthquakes near Arecibo 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. 2.7 14 km NE of Arecibo, Puerto Rico
  2. 3.0 Puerto Rico region
  3. 3.3 49 km N of Tierras Nuevas Poniente, Puerto Rico
  4. 3.0 67 km N of Brenas, Puerto Rico
  5. 2.6 4 km NNE of Carrizales, Puerto Rico
  6. 2.5 17 km NNW of Brenas, Puerto Rico
  7. 3.5 3 km WSW of Manatí, Puerto Rico
  8. 2.9 35 km N of Carrizales, Puerto Rico
  9. 2.8 20 km N of Carrizales, Puerto Rico
  10. 2.6 16 km NNW of Camuy, Puerto Rico
  11. 2.5 39 km N of Tierras Nuevas Poniente, Puerto Rico
  12. 2.7 11 km N of Arecibo, Puerto Rico
  13. 3.3 Puerto Rico region
  14. 3.0 Puerto Rico region
  15. 3.1 52 km N of Brenas, 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 180 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.