QuakeIndex

Earthquake · reviewed by a seismologist

M 1.9md

4 km SSW of Comerío, Puerto Rico

· 21 km deep · released about 25 lb of TNT

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10 km30 km60 km120 km N Comerío Municipio 5 kmAibonito Municipio 6 kmBarranquitas Municipio 7 kmCidra Municipio 9 kmNaranjito Municipio 12 kmCayey Municipio 13 kmAguas Buenas Municipio 15 kmCoamo Municipio 15 kmCorozal 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 1.9 (md)
Depth
21 km below the surface
Felt
no reports yet
Nearest
Comerío Municipio, 5 km NNE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 855 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 25 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.0 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 600,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 420,000× the energy of this one
  3. Around the size people start to feel M 3.0 38× the energy of this one
  4. This earthquake M 1.9 about 25 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 18.1837, -66.2432. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Comerío Municipio, PR 5 km (3 mi) SSW of here earthquakes near Comerío Municipio
Aibonito Municipio, PR 6 km (4 mi) NNE of here earthquakes near Aibonito Municipio
Barranquitas Municipio, PR 7 km (4 mi) ESE of here earthquakes near Barranquitas Municipio
Cidra Municipio, PR 9 km (5 mi) W of here earthquakes near Cidra Municipio
Naranjito Municipio, PR 12 km (7 mi) S of here earthquakes near Naranjito Municipio
Cayey Municipio, PR 13 km (8 mi) NW of here earthquakes near Cayey Municipio

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

Aftershocks so far

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

  1. 2.5 4 km NW of Orocovis, Puerto Rico
  2. 2.6 3 km SSW of Capitanejo, Puerto Rico
  3. 2.3 1 km W of Capitanejo, Puerto Rico
  4. 2.6 3 km NW of Orocovis, Puerto Rico
  5. 2.1 3 km SSW of Potala Pastillo, Puerto Rico
  6. 2.0 6 km W of Orocovis, Puerto Rico
  7. 2.5 3 km SW of G. L. Garcia, Puerto Rico
  8. 3.4 6 km NNW of Vega Baja, Puerto Rico
  9. 2.6 4 km WNW of Orocovis, Puerto Rico
  10. 2.4 11 km S of Salinas, Puerto Rico
  11. 3.3 6 km WSW of Estancias de Florida, Puerto Rico
  12. 2.5 6 km NE of Tallaboa Alta, Puerto Rico
  13. 3.0 1 km NNE of Manatí, Puerto Rico
  14. 2.6 4 km SE of Jauca, Puerto Rico
  15. 2.3 3 km WNW of Orocovis, 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 9,400 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.