QuakeIndex

Earthquake · reviewed by a seismologist

M 3.0md

15 km N of Arecibo, Puerto Rico

· 76 km deep · released about 830 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Arecibo Municipio 20 kmHatillo Municipio 20 kmBarceloneta Municipio 23 kmCamuy Municipio 23 kmQuebradillas Municipio 27 kmManatí Municipio 30 kmFlorida Municipio 32 kmIsabela Municipio 34 kmUtuado Municipio 38 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 3.0 (md)
Depth
76 km below the surface
Felt
no reports yet
Nearest
Arecibo Municipio, 20 km SSE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 13 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 830 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.0 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 410,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 18,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 13,000× the energy of this one
  4. This earthquake M 3.0 about 830 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 18.6082, -66.7237. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Arecibo Municipio, PR 20 km (12 mi) NNW of here earthquakes near Arecibo Municipio
Hatillo Municipio, PR 20 km (13 mi) NNE of here earthquakes near Hatillo Municipio
Barceloneta Municipio, PR 23 km (14 mi) NW of here earthquakes near Barceloneta Municipio
Camuy Municipio, PR 23 km (14 mi) NE of here earthquakes near Camuy Municipio
Quebradillas Municipio, PR 27 km (17 mi) NE of here earthquakes near Quebradillas Municipio
Manatí Municipio, PR 30 km (19 mi) NW of here earthquakes near Manatí Municipio

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

Aftershocks so far

4 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. 2.5 11 km N of Quebradillas, Puerto Rico
  4. 2.4 6 km SW of Cayuco, 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 140 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.