QuakeIndex

Earthquake · reviewed by a seismologist

M 2.8md

7 km ENE of Arecibo, Puerto Rico

· 114 km deep · released about 430 lb of TNT

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10 km30 km60 km120 km N Arecibo Municipio 8 kmBarceloneta Municipio 11 kmHatillo Municipio 16 kmFlorida Municipio 18 kmManatí Municipio 19 kmCamuy Municipio 23 kmUtuado Municipio 26 kmCiales Municipio 28 kmVega Baja Municipio 28 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 2.8 (md)
Depth
114 km below the surface
Felt
no reports yet
Nearest
Arecibo Municipio, 8 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3072 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 430 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 35,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 25,000× the energy of this one
  3. Around the size people start to feel M 3.0 2.2× the energy of this one
  4. This earthquake M 2.8 about 430 lb of TNT

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 18.5053, -66.6588. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Arecibo Municipio, PR 8 km (5 mi) NNE of here earthquakes near Arecibo Municipio
Barceloneta Municipio, PR 11 km (7 mi) WNW of here earthquakes near Barceloneta Municipio
Hatillo Municipio, PR 16 km (10 mi) ENE of here earthquakes near Hatillo Municipio
Florida Municipio, PR 18 km (11 mi) NNW of here earthquakes near Florida Municipio
Manatí Municipio, PR 19 km (12 mi) WNW of here earthquakes near Manatí Municipio
Camuy Municipio, PR 23 km (14 mi) ENE of here earthquakes near Camuy Municipio

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

Aftershocks so far

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

  1. 2.6 Puerto Rico region
  2. 1.7 8 km NW of Santo Domingo, Puerto Rico
  3. 2.5 12 km NNE of Brenas, Puerto Rico
  4. 1.9 9 km NNW of Garrochales, Puerto Rico
  5. 2.8 2 km NW of Dorado, Puerto Rico
  6. 2.8 4 km N of Barceloneta, Puerto Rico
  7. 2.6 29 km N of Hatillo, Puerto Rico
  8. 2.2 5 km NNW of Levittown, Puerto Rico
  9. 2.2 3 km NNW of Orocovis, Puerto Rico
  10. 2.5 4 km NNW of Arecibo, Puerto Rico
  11. 1.6 20 km N of Hatillo, Puerto Rico
  12. 2.7 50 km N of Tierras Nuevas Poniente, Puerto Rico
  13. 2.4 14 km NNW of Isabela, Puerto Rico
  14. 2.4 12 km N of Arecibo, Puerto Rico
  15. 2.0 6 km ESE of Maricao, 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.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.