QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1md

7 km SSW of Corozal, Puerto Rico

· 32 km deep · released about 49 lb of TNT

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10 km30 km60 km120 km N Corozal Municipio 3 kmMorovis Municipio 9 kmBarranquitas Municipio 10 kmNaranjito Municipio 10 kmOrocovis Municipio 12 kmToa Alta Municipio 14 kmComerío Municipio 15 kmVega Alta Municipio 18 kmCiales Municipio 18 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 2.1 (md)
Depth
32 km below the surface
Felt
no reports yet
Nearest
Corozal Municipio, 3 km NE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 733 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

How big was it?

This earthquake released about 49 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.1 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 310,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 220,000× the energy of this one
  3. Around the size people start to feel M 3.0 19× the energy of this one
  4. This earthquake M 2.1 about 49 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 18.2788, -66.3450. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Corozal Municipio, PR 3 km (2 mi) SW of here earthquakes near Corozal Municipio
Morovis Municipio, PR 9 km (6 mi) ESE of here earthquakes near Morovis Municipio
Barranquitas Municipio, PR 10 km (6 mi) NNW of here earthquakes near Barranquitas Municipio
Naranjito Municipio, PR 10 km (6 mi) W of here earthquakes near Naranjito Municipio
Orocovis Municipio, PR 12 km (7 mi) NE of here earthquakes near Orocovis Municipio
Toa Alta Municipio, PR 14 km (9 mi) SW of here earthquakes near Toa Alta 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. 2.0 2 km S of Adjuntas, Puerto Rico
  2. 2.7 15 km NNW of Garrochales, Puerto Rico
  3. 3.1 5 km N of Brenas, Puerto Rico
  4. 2.8 1 km SE of Naranjito, 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.