QuakeIndex

Earthquake · reviewed by a seismologist

M 3.1md

5 km N of Garrochales, Puerto Rico

· 96 km deep · released about 1,300 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Barceloneta Municipio 4 kmManatí Municipio 10 kmArecibo Municipio 14 kmFlorida Municipio 15 kmVega Baja Municipio 19 kmCiales Municipio 24 kmHatillo Municipio 25 kmVega Alta Municipio 26 kmMorovis 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 3.1 (md)
Depth
96 km below the surface
Felt
no reports yet
Nearest
Barceloneta Municipio, 4 km SSE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1313 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 1,300 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.1 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 270,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 12,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 8,500× the energy of this one
  4. This earthquake M 3.1 about 1,300 lb of TNT
  5. Around the size people start to feel M 3.0 this one released 1.3× 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 18.5040, -66.5680. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Barceloneta Municipio, PR 4 km (2 mi) NNW of here earthquakes near Barceloneta Municipio
Manatí Municipio, PR 10 km (6 mi) NW of here earthquakes near Manatí Municipio
Arecibo Municipio, PR 14 km (9 mi) NE of here earthquakes near Arecibo Municipio
Florida Municipio, PR 15 km (9 mi) N of here earthquakes near Florida Municipio
Vega Baja Municipio, PR 19 km (12 mi) WNW of here earthquakes near Vega Baja Municipio
Ciales Municipio, PR 24 km (15 mi) NNW of here earthquakes near Ciales Municipio

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

Aftershocks so far

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

  1. 2.5 13 km ESE of Maricao, Puerto Rico
  2. 3.1 8 km SSW of Orocovis, Puerto Rico
  3. 2.7 Puerto Rico region
  4. 2.9 30 km N of Arecibo, Puerto Rico
  5. 3.1 36 km N of Carrizales, Puerto Rico
  6. 3.2 10 km NNW of Levittown, Puerto Rico
  7. 3.2 3 km NNW of Jayuya, Puerto Rico
  8. 2.8 15 km NE of Arecibo, Puerto Rico
  9. 2.8 17 km N of Isabela, Puerto Rico
  10. 2.8 23 km N of Tierras Nuevas Poniente, Puerto Rico
  11. 2.6 6 km N of Cayuco, Puerto Rico
  12. 2.9 Puerto Rico region
  13. 2.6 11 km N of Carrizales, Puerto Rico
  14. 3.0 25 km NNE of Isabela, Puerto Rico
  15. 2.8 0 km SSW of San Juan, 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 4.4 on 2018-12-09 — it released about 95 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.