QuakeIndex

Earthquake · reviewed by a seismologist

M 3.1md

Puerto Rico region

· 130 km deep · released about 1,300 lb of TNT

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10 km30 km60 km120 km N Morovis Municipio 5 kmCorozal Municipio 5 kmOrocovis Municipio 12 kmNaranjito Municipio 13 kmVega Alta Municipio 14 kmBarranquitas Municipio 14 kmToa Alta Municipio 15 kmCiales Municipio 15 kmVega Baja Municipio 16 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
130 km below the surface
Felt
no reports yet
Nearest
Morovis Municipio, 5 km W
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1642 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 1,300 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 6.7 260,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 12,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 8,200× the energy of this one
  4. This earthquake M 3.1 about 1,300 lb of TNT
  5. Around the size people start to feel M 3.0 this one released 1.4× 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 18.3142, -66.3755. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Morovis Municipio, PR 5 km (3 mi) E of here earthquakes near Morovis Municipio
Corozal Municipio, PR 5 km (3 mi) WNW of here earthquakes near Corozal Municipio
Orocovis Municipio, PR 12 km (8 mi) NNE of here earthquakes near Orocovis Municipio
Naranjito Municipio, PR 13 km (8 mi) WNW of here earthquakes near Naranjito Municipio
Vega Alta Municipio, PR 14 km (9 mi) SSW of here earthquakes near Vega Alta Municipio
Barranquitas Municipio, PR 14 km (9 mi) NNW of here earthquakes near Barranquitas 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. 3.0 2 km N of Yaurel, Puerto Rico
  2. 2.8 0 km SW of Pastos, Puerto Rico
  3. 2.5 2 km NNW of Tallaboa, 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.