QuakeIndex

Earthquake · reviewed by a seismologist

M 3.0md

3 km NW of H. Rivera Colon, Puerto Rico

· 117 km deep · released about 1,000 lb of TNT

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10 km30 km60 km120 km N Toa Alta Municipio 6 kmCorozal Municipio 8 kmVega Alta Municipio 9 kmNaranjito Municipio 10 kmDorado Municipio 12 kmBayamón Municipio 14 kmMorovis Municipio 14 kmVega Baja Municipio 14 kmToa Baja 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 3.0 (md)
Depth
117 km below the surface
Felt
no reports yet
Nearest
Toa Alta Municipio, 6 km E
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 539 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 1,000 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 6.7 330,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 15,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 10,000× the energy of this one
  4. This earthquake M 3.0 about 1,000 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 18.3678, -66.2980. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Toa Alta Municipio, PR 6 km (4 mi) W of here earthquakes near Toa Alta Municipio
Corozal Municipio, PR 8 km (5 mi) NNE of here earthquakes near Corozal Municipio
Vega Alta Municipio, PR 9 km (5 mi) SSE of here earthquakes near Vega Alta Municipio
Naranjito Municipio, PR 10 km (6 mi) NNW of here earthquakes near Naranjito Municipio
Dorado Municipio, PR 12 km (8 mi) SSW of here earthquakes near Dorado Municipio
Bayamón Municipio, PR 14 km (9 mi) W of here earthquakes near Bayamón 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. 2.8 25 km N of Tierras Nuevas Poniente, Puerto Rico
  2. 2.7 27 km NNW of Brenas, Puerto Rico
  3. 2.3 1 km SSE of Salinas, Puerto Rico
  4. 2.2 3 km NW of Orocovis, Puerto Rico
  5. 2.4 4 km SW of Las Piedras, Puerto Rico
  6. 3.0 12 km NNW of San Juan, 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.