QuakeIndex

Earthquake · reviewed by a seismologist

M 3.4md

94 km N of Arecibo, Puerto Rico

· 28 km deep · released about 2 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Barceloneta Municipio 94 kmManatí Municipio 97 kmVega Baja Municipio 97 kmArecibo Municipio 98 kmDorado Municipio 99 kmHatillo Municipio 100 kmVega Alta Municipio 101 kmCamuy Municipio 101 kmQuebradillas Municipio 102 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 3.4 (md)
Depth
28 km below the surface
Felt
no reports yet
Nearest
Barceloneta Municipio, 94 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1300 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 2 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.4 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 86,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 3,800× the energy of this one
  3. Magna, Utah 2020 M 5.7 2,700× the energy of this one
  4. This earthquake M 3.4 about 2 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 4.1× 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 19.3133, -66.5672. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Barceloneta Municipio, PR 94 km (58 mi) N of here earthquakes near Barceloneta Municipio
Manatí Municipio, PR 97 km (60 mi) N of here earthquakes near Manatí Municipio
Vega Baja Municipio, PR 97 km (60 mi) N of here earthquakes near Vega Baja Municipio
Arecibo Municipio, PR 98 km (61 mi) N of here earthquakes near Arecibo Municipio
Dorado Municipio, PR 99 km (61 mi) NNW of here earthquakes near Dorado Municipio
Hatillo Municipio, PR 100 km (62 mi) NNE of here earthquakes near Hatillo Municipio

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

Aftershocks so far

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

  1. 3.3 66 km N of Tierras Nuevas Poniente, Puerto Rico
  2. 3.2 69 km N of Tierras Nuevas Poniente, Puerto Rico
  3. 3.2 78 km N of Tierras Nuevas Poniente, Puerto Rico
  4. 3.4 59 km N of Hatillo, Puerto Rico
  5. 3.6 64 km N of Hatillo, Puerto Rico
  6. 3.3 87 km N of Arecibo, Puerto Rico
  7. 3.6 Puerto Rico region
  8. 3.3 85 km N of Tierras Nuevas Poniente, Puerto Rico
  9. 3.3 80 km N of Tierras Nuevas Poniente, Puerto Rico
  10. 3.3 77 km N of Tierras Nuevas Poniente, Puerto Rico
  11. 3.2 77 km N of Brenas, Puerto Rico
  12. 3.1 68 km N of Tierras Nuevas Poniente, Puerto Rico
  13. 3.6 70 km N of Hatillo, Puerto Rico
  14. 3.1 45 km N of Tierras Nuevas Poniente, Puerto Rico
  15. 3.4 65 km N of Hatillo, 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 120 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.