QuakeIndex

Earthquake · reviewed by a seismologist

M 2.8md

12 km N of Arecibo, Puerto Rico

· 18 km deep · released about 510 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Arecibo Municipio 18 kmHatillo Municipio 18 kmCamuy Municipio 22 kmBarceloneta Municipio 22 kmQuebradillas Municipio 25 kmManatí Municipio 29 kmFlorida Municipio 29 kmIsabela Municipio 33 kmUtuado Municipio 35 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
18 km below the surface
Felt
no reports yet
Nearest
Arecibo Municipio, 18 km SSE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1846 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 510 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 30,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 21,000× the energy of this one
  3. Around the size people start to feel M 3.0 1.9× the energy of this one
  4. This earthquake M 2.8 about 510 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 18.5856, -66.7223. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Arecibo Municipio, PR 18 km (11 mi) NNW of here earthquakes near Arecibo Municipio
Hatillo Municipio, PR 18 km (11 mi) NNE of here earthquakes near Hatillo Municipio
Camuy Municipio, PR 22 km (13 mi) NE of here earthquakes near Camuy Municipio
Barceloneta Municipio, PR 22 km (13 mi) NW of here earthquakes near Barceloneta Municipio
Quebradillas Municipio, PR 25 km (16 mi) ENE of here earthquakes near Quebradillas Municipio
Manatí Municipio, PR 29 km (18 mi) WNW of here earthquakes near Manatí Municipio

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

Aftershocks so far

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

  1. 3.3 1 km WNW of Morovis, Puerto Rico
  2. 2.6 23 km NNE of Isabela, Puerto Rico
  3. 2.1 18 km NNE of Carrizales, Puerto Rico
  4. 2.9 13 km N of Brenas, Puerto Rico
  5. 3.1 52 km N of Carrizales, Puerto Rico
  6. 3.0 42 km N of Tierras Nuevas Poniente, Puerto Rico
  7. 2.1 2 km ESE of Moca, Puerto Rico
  8. 3.4 28 km N of Arecibo, Puerto Rico
  9. 3.0 16 km N of Camuy, Puerto Rico
  10. 2.3 10 km SSE of Lares, Puerto Rico
  11. 2.6 25 km N of Garrochales, Puerto Rico
  12. 2.7 13 km NNW of Camuy, Puerto Rico
  13. 3.0 19 km N of Camuy, Puerto Rico
  14. 2.9 10 km NNE of Arecibo, Puerto Rico
  15. 3.5 1 km E of Arecibo, 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 230 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.