QuakeIndex

Earthquake · reviewed by a seismologist

M 3.0md

2 km ENE of Cidra, Puerto Rico

· 76 km deep · released about 890 lb of TNT

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10 km30 km60 km120 km N Cidra Municipio 2 kmAguas Buenas Municipio 8 kmCayey Municipio 9 kmComerío Municipio 9 kmCaguas Municipio 10 kmAibonito Municipio 14 kmNaranjito Municipio 17 kmBarranquitas Municipio 18 kmGuaynabo Municipio 18 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
76 km below the surface
Felt
no reports yet
Nearest
Cidra Municipio, 2 km WSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 597 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 890 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 6.7 380,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 17,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 12,000× the energy of this one
  4. This earthquake M 3.0 about 890 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 18.1848, -66.1418. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Cidra Municipio, PR 2 km (1 mi) ENE of here earthquakes near Cidra Municipio
Aguas Buenas Municipio, PR 8 km (5 mi) S of here earthquakes near Aguas Buenas Municipio
Cayey Municipio, PR 9 km (6 mi) N of here earthquakes near Cayey Municipio
Comerío Municipio, PR 9 km (6 mi) ESE of here earthquakes near Comerío Municipio
Caguas Municipio, PR 10 km (6 mi) WSW of here earthquakes near Caguas Municipio
Aibonito Municipio, PR 14 km (9 mi) ENE of here earthquakes near Aibonito Municipio

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

Aftershocks so far

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

  1. 2.0 8 km ENE of Jayuya, Puerto Rico
  2. 3.6 1 km SSE of Galateo, Puerto Rico
  3. 2.8 5 km E of Naranjito, Puerto Rico
  4. 3.0 4 km NW of Orocovis, Puerto Rico
  5. 2.5 5 km SSE of Bajandas, Puerto Rico
  6. 1.7 2 km E of Arroyo, Puerto Rico
  7. 3.0 2 km N of Tierras Nuevas Poniente, Puerto Rico
  8. 2.1 2 km NE of Jayuya, Puerto Rico
  9. 2.1 5 km SSE of Bajandas, Puerto Rico
  10. 2.6 3 km ESE of Cataño, Puerto Rico
  11. 3.1 1 km S of Campanilla, Puerto Rico
  12. 3.0 5 km NNW of Dorado, Puerto Rico
  13. 2.3 1 km SSE of Salinas, Puerto Rico
  14. 2.2 3 km NW of Orocovis, Puerto Rico
  15. 2.4 4 km SW of Las Piedras, 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 270 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.