QuakeIndex

Earthquake · reviewed by a seismologist

M 2.8md

2 km N of Arecibo, Puerto Rico

· 84 km deep · released about 480 lb of TNT

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10 km30 km60 km120 km N Arecibo Municipio 8 kmHatillo Municipio 11 kmBarceloneta Municipio 16 kmCamuy Municipio 17 kmFlorida Municipio 21 kmQuebradillas Municipio 23 kmManatí Municipio 24 kmUtuado Municipio 25 kmLares Municipio 30 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
84 km below the surface
Felt
no reports yet
Nearest
Arecibo Municipio, 8 km SSE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2930 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 480 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 32,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 22,000× the energy of this one
  3. Around the size people start to feel M 3.0 2× the energy of this one
  4. This earthquake M 2.8 about 480 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 18.4983, -66.7110. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Arecibo Municipio, PR 8 km (5 mi) NNW of here earthquakes near Arecibo Municipio
Hatillo Municipio, PR 11 km (7 mi) NE of here earthquakes near Hatillo Municipio
Barceloneta Municipio, PR 16 km (10 mi) W of here earthquakes near Barceloneta Municipio
Camuy Municipio, PR 17 km (11 mi) ENE of here earthquakes near Camuy Municipio
Florida Municipio, PR 21 km (13 mi) NW of here earthquakes near Florida Municipio
Quebradillas Municipio, PR 23 km (14 mi) E of here earthquakes near Quebradillas 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. 1.6 8 km ENE of Sabana Grande, Puerto Rico
  2. 2.9 8 km NNW of Dorado, Puerto Rico
  3. 1.9 6 km W of Las Marías, Puerto Rico
  4. 2.4 4 km NNE of Orocovis, Puerto Rico
  5. 2.3 20 km N of Garrochales, Puerto Rico
  6. 2.2 6 km NNE of Sabana Grande, Puerto Rico
  7. 2.1 11 km SSE of Lares, Puerto Rico
  8. 2.0 9 km N of Animas, Puerto Rico
  9. 2.1 4 km NNE of Yauco, Puerto Rico
  10. 2.2 1 km W of Rafael Gonzalez, Puerto Rico
  11. 2.1 3 km SW of Maricao, Puerto Rico
  12. 2.9 36 km N of Tierras Nuevas Poniente, Puerto Rico
  13. 2.4 18 km N of San Antonio, Puerto Rico
  14. 2.7 6 km E of Espino, Puerto Rico
  15. 2.3 5 km WNW of Las Marías, 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.