QuakeIndex

Earthquake · reviewed by a seismologist

M 2.8md

43 km NNE of Arecibo, Puerto Rico

· 16 km deep · released about 460 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Barceloneta Municipio 44 kmArecibo Municipio 48 kmManatí Municipio 48 kmHatillo Municipio 50 kmVega Baja Municipio 51 kmCamuy Municipio 52 kmQuebradillas Municipio 54 kmFlorida Municipio 55 kmVega Alta Municipio 56 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
16 km below the surface
Felt
no reports yet
Nearest
Barceloneta Municipio, 44 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 26 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 460 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 33,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 23,000× the energy of this one
  3. Around the size people start to feel M 3.0 2.1× the energy of this one
  4. This earthquake M 2.8 about 460 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 18.8592, -66.6278. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Barceloneta Municipio, PR 44 km (27 mi) N of here earthquakes near Barceloneta Municipio
Arecibo Municipio, PR 48 km (30 mi) N of here earthquakes near Arecibo Municipio
Manatí Municipio, PR 48 km (30 mi) NNW of here earthquakes near Manatí Municipio
Hatillo Municipio, PR 50 km (31 mi) NNE of here earthquakes near Hatillo Municipio
Vega Baja Municipio, PR 51 km (32 mi) NNW of here earthquakes near Vega Baja Municipio
Camuy Municipio, PR 52 km (32 mi) NNE of here earthquakes near Camuy Municipio

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

Aftershocks so far

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

  1. 2.8 8 km NNE of Tierras Nuevas Poniente, Puerto Rico
  2. 2.8 13 km NNE of Carrizales, Puerto Rico
  3. 3.1 75 km N of Brenas, Puerto Rico
  4. 2.5 11 km N of Quebradillas, Puerto Rico
  5. 3.0 15 km N of Arecibo, Puerto Rico
  6. 3.2 27 km N of Isabela, Puerto Rico
  7. 2.9 65 km N of Tierras Nuevas Poniente, 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 1,000 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.