QuakeIndex

Earthquake · reviewed by a seismologist

M 4.1md

72 km N of Arecibo, Puerto Rico

· 23 km deep · released about 22 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Barceloneta Municipio 73 kmManatí Municipio 77 kmArecibo Municipio 77 kmHatillo Municipio 78 kmVega Baja Municipio 78 kmCamuy Municipio 79 kmQuebradillas Municipio 79 kmDorado Municipio 82 kmIsabela Municipio 82 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 4.1 (md)
Depth
23 km below the surface
Felt
2 reports · strongest reported intensity II
Nearest
Barceloneta Municipio, 73 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1513 days ago

This was a light earthquake. It is usually felt clearly nearby and can rattle windows and dishes, but damage is uncommon. 2 people have reported feeling it to USGS.

How big was it?

This earthquake released about 22 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 5.1 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 7,700× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 340× the energy of this one
  3. Magna, Utah 2020 M 5.7 240× the energy of this one
  4. This earthquake M 4.1 about 22 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 46× 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 19.1213, -66.6275. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Barceloneta Municipio, PR 73 km (45 mi) N of here earthquakes near Barceloneta Municipio
Manatí Municipio, PR 77 km (48 mi) N of here earthquakes near Manatí Municipio
Arecibo Municipio, PR 77 km (48 mi) N of here earthquakes near Arecibo Municipio
Hatillo Municipio, PR 78 km (48 mi) NNE of here earthquakes near Hatillo Municipio
Vega Baja Municipio, PR 78 km (48 mi) NNW of here earthquakes near Vega Baja Municipio
Camuy Municipio, PR 79 km (49 mi) NNE of here earthquakes near Camuy 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. 3.4 77 km N of Brenas, Puerto Rico
  2. 3.4 83 km N of Brenas, Puerto Rico
  3. 2.9 82 km N of Brenas, Puerto Rico
  4. 3.5 87 km N of Brenas, Puerto Rico
  5. 2.9 46 km N of Isabela, Puerto Rico
  6. 3.3 76 km N of Brenas, Puerto Rico
  7. 2.9 32 km N of Arecibo, Puerto Rico
  8. 3.2 Puerto Rico region
  9. 3.0 65 km N of Tierras Nuevas Poniente, Puerto Rico
  10. 3.0 78 km N of Arecibo, Puerto Rico
  11. 3.2 83 km N of Tierras Nuevas Poniente, Puerto Rico
  12. 3.0 23 km NNE of Arecibo, Puerto Rico
  13. 3.0 49 km NNE of Isabela, Puerto Rico
  14. 3.1 96 km N of Brenas, Puerto Rico
  15. 3.1 80 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 11 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.