QuakeIndex

Earthquake · reviewed by a seismologist

M 3.1md

2 km SW of Hato Candal, Puerto Rico

· 128 km deep · released about 1,400 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Río Grande Municipio 2 kmCanóvanas Municipio 10 kmLuquillo Municipio 10 kmLoíza Municipio 18 kmNaguabo Municipio 18 kmCarolina Municipio 18 kmJuncos Municipio 19 kmLas Piedras Municipio 21 kmGurabo Municipio 21 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 3.1 (md)
Depth
128 km below the surface
Felt
no reports yet
Nearest
Río Grande Municipio, 2 km N
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 27 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 1,400 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.1 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 230,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 10,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 7,400× the energy of this one
  4. This earthquake M 3.1 about 1,400 lb of TNT
  5. Around the size people start to feel M 3.0 this one released 1.5× more

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 18.3602, -65.8015. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Río Grande Municipio, PR 2 km (1 mi) S of here earthquakes near Río Grande Municipio
Canóvanas Municipio, PR 10 km (6 mi) ENE of here earthquakes near Canóvanas Municipio
Luquillo Municipio, PR 10 km (6 mi) W of here earthquakes near Luquillo Municipio
Loíza Municipio, PR 18 km (11 mi) ESE of here earthquakes near Loíza Municipio
Naguabo Municipio, PR 18 km (11 mi) NNW of here earthquakes near Naguabo Municipio
Carolina Municipio, PR 18 km (11 mi) ESE of here earthquakes near Carolina Municipio

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

Aftershocks so far

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

  1. 2.9 8 km WNW of Culebra, Puerto Rico
  2. 3.1 12 km SE of Emajagua, Puerto Rico
  3. 3.2 7 km ENE of Fajardo, 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 4.6 on 2016-12-05 — it released about 170 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.