QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1md

3 km E of Comerío, Puerto Rico

· 25 km deep · released about 44 lb of TNT

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10 km30 km60 km120 km N Comerío Municipio 3 kmCidra Municipio 6 kmAguas Buenas Municipio 7 kmNaranjito Municipio 10 kmBarranquitas Municipio 13 kmAibonito Municipio 13 kmCayey Municipio 14 kmBayamón Municipio 14 kmCaguas 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 2.1 (md)
Depth
25 km below the surface
Felt
no reports yet
Nearest
Comerío Municipio, 3 km W
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1406 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 44 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 5.8 340,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 240,000× the energy of this one
  3. Around the size people start to feel M 3.0 22× the energy of this one
  4. This earthquake M 2.1 about 44 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 18.2240, -66.1897. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Comerío Municipio, PR 3 km (2 mi) E of here earthquakes near Comerío Municipio
Cidra Municipio, PR 6 km (4 mi) NNW of here earthquakes near Cidra Municipio
Aguas Buenas Municipio, PR 7 km (5 mi) WSW of here earthquakes near Aguas Buenas Municipio
Naranjito Municipio, PR 10 km (6 mi) SE of here earthquakes near Naranjito Municipio
Barranquitas Municipio, PR 13 km (8 mi) ENE of here earthquakes near Barranquitas Municipio
Aibonito Municipio, PR 13 km (8 mi) NE of here earthquakes near Aibonito Municipio

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

Aftershocks so far

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

  1. 3.4 5 km SSW of Ramos, Puerto Rico
  2. 3.1 3 km SSW of Cayey, Puerto Rico
  3. 2.6 2 km NNE of Orocovis, Puerto Rico
  4. 2.6 24 km NNE of Dorado, Puerto Rico
  5. 2.8 3 km W of Miranda, Puerto Rico
  6. 2.1 5 km SSW of Potala Pastillo, Puerto Rico
  7. 1.9 9 km SSW of Emajagua, Puerto Rico
  8. 3.1 Puerto Rico region
  9. 2.9 7 km NNW of Dorado, Puerto Rico
  10. 3.0 4 km NW of Corozal, Puerto Rico
  11. 2.2 6 km NNW of Jayuya, Puerto Rico
  12. 2.8 16 km S of Lamboglia, Puerto Rico
  13. 2.6 5 km NW of Palomas, Puerto Rico
  14. 3.7 0 km ESE of Campanilla, Puerto Rico
  15. 2.9 3 km E 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.

For this area

The largest earthquake within 50 km in our catalogue was M 4.6 on 2016-12-05 — it released about 5,400 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.