QuakeIndex

Earthquake · reviewed by a seismologist

M 2.9md

2 km ESE of H. Rivera Colon, Puerto Rico

· 60 km deep · released about 570 lb of TNT

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10 km30 km60 km120 km N Toa Alta Municipio 3 kmNaranjito Municipio 5 kmBayamón Municipio 9 kmCorozal Municipio 9 kmComerío Municipio 13 kmGuaynabo Municipio 14 kmVega Alta Municipio 15 kmToa Baja Municipio 15 kmAguas Buenas Municipio 15 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 2.9 (md)
Depth
60 km below the surface
Felt
no reports yet
Nearest
Toa Alta Municipio, 3 km N
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2846 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 570 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 27,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 19,000× the energy of this one
  3. Around the size people start to feel M 3.0 1.7× the energy of this one
  4. This earthquake M 2.9 about 570 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 18.3356, -66.2486. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Toa Alta Municipio, PR 3 km (2 mi) S of here earthquakes near Toa Alta Municipio
Naranjito Municipio, PR 5 km (3 mi) N of here earthquakes near Naranjito Municipio
Bayamón Municipio, PR 9 km (5 mi) W of here earthquakes near Bayamón Municipio
Corozal Municipio, PR 9 km (6 mi) ENE of here earthquakes near Corozal Municipio
Comerío Municipio, PR 13 km (8 mi) NNW of here earthquakes near Comerío Municipio
Guaynabo Municipio, PR 14 km (9 mi) W of here earthquakes near Guaynabo Municipio

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

Aftershocks so far

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

  1. 1.8 1 km NNW of Sumidero, Puerto Rico
  2. 2.1 11 km N of Loíza, Puerto Rico
  3. 1.9 2 km SW of Las Ollas, Puerto Rico
  4. 2.6 14 km N of Brenas, Puerto Rico
  5. 1.8 1 km NW of H. Rivera Colon, Puerto Rico
  6. 1.6 3 km SE of Santa Isabel, 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.