QuakeIndex

Earthquake · reviewed by a seismologist

M 2.8md

10 km NNE of Arecibo, Puerto Rico

· 24 km deep · released about 480 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Arecibo Municipio 15 kmHatillo Municipio 18 kmBarceloneta Municipio 18 kmCamuy Municipio 22 kmManatí Municipio 25 kmFlorida Municipio 26 kmQuebradillas Municipio 27 kmUtuado Municipio 33 kmVega Baja Municipio 34 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
24 km below the surface
Felt
no reports yet
Nearest
Arecibo Municipio, 15 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3416 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 18.5666, -66.6943. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Arecibo Municipio, PR 15 km (9 mi) N of here earthquakes near Arecibo Municipio
Hatillo Municipio, PR 18 km (11 mi) NE of here earthquakes near Hatillo Municipio
Barceloneta Municipio, PR 18 km (11 mi) NW of here earthquakes near Barceloneta Municipio
Camuy Municipio, PR 22 km (14 mi) NE of here earthquakes near Camuy Municipio
Manatí Municipio, PR 25 km (16 mi) WNW of here earthquakes near Manatí Municipio
Florida Municipio, PR 26 km (16 mi) NNW of here earthquakes near Florida Municipio

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

Aftershocks so far

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

  1. 2.7 15 km NNE of Hatillo, Puerto Rico
  2. 2.3 1 km S of Río Lajas, Puerto Rico
  3. 2.5 10 km WSW of Adjuntas, Puerto Rico
  4. 3.0 10 km NNW of Camuy, Puerto Rico
  5. 2.2 2 km SW of San Sebastián, Puerto Rico
  6. 1.7 7 km ESE of Las Marías, Puerto Rico
  7. 2.7 20 km N of Brenas, Puerto Rico
  8. 2.7 51 km N of Carrizales, Puerto Rico
  9. 2.2 26 km N of Arecibo, Puerto Rico
  10. 2.8 33 km N of Tierras Nuevas Poniente, Puerto Rico
  11. 3.0 4 km N of Carrizales, Puerto Rico
  12. 2.6 18 km N of Isabela, Puerto Rico
  13. 2.9 48 km N of Isabela, Puerto Rico
  14. 2.7 42 km N of Brenas, Puerto Rico
  15. 3.1 1 km SW of San Antonio, 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.