QuakeIndex

Earthquake · reviewed by a seismologist

M 3.3md

1 km SE of Sumidero, Puerto Rico

· 122 km deep · released about 1.3 tons of TNT

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10 km30 km60 km120 km N Aguas Buenas Municipio 6 kmCidra Municipio 6 kmCaguas Municipio 7 kmComerío Municipio 11 kmCayey Municipio 12 kmGuaynabo Municipio 15 kmGurabo Municipio 16 kmSan Lorenzo Municipio 16 kmBayamón Municipio 17 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 3.3 (md)
Depth
122 km below the surface
Felt
no reports yet
Nearest
Aguas Buenas Municipio, 6 km NNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3030 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 1.3 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.3 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 130,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 6,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 4,300× the energy of this one
  4. This earthquake M 3.3 about 1.3 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 2.6× more

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 18.2083, -66.1133. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Aguas Buenas Municipio, PR 6 km (3 mi) SSE of here earthquakes near Aguas Buenas Municipio
Cidra Municipio, PR 6 km (4 mi) NE of here earthquakes near Cidra Municipio
Caguas Municipio, PR 7 km (4 mi) W of here earthquakes near Caguas Municipio
Comerío Municipio, PR 11 km (7 mi) E of here earthquakes near Comerío Municipio
Cayey Municipio, PR 12 km (8 mi) NNE of here earthquakes near Cayey Municipio
Guaynabo Municipio, PR 15 km (9 mi) S of here earthquakes near Guaynabo Municipio

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

Aftershocks so far

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

  1. 2.3 5 km SSW of Lamboglia, Puerto Rico
  2. 2.1 5 km SSW of Lamboglia, Puerto Rico
  3. 1.6 4 km N of Los Llanos, Puerto Rico
  4. 2.2 6 km SSW of Lamboglia, Puerto Rico
  5. 2.5 5 km S of Palmas, Puerto Rico
  6. 2.0 2 km N of Yaurel, Puerto Rico
  7. 1.7 3 km S of Palmas, Puerto Rico
  8. 3.0 7 km SSW of Lamboglia, Puerto Rico
  9. 3.9 6 km SSW of Lamboglia, Puerto Rico
  10. 3.0 6 km NW of Sabana, Puerto Rico
  11. 1.6 1 km SSW of Mariano Colón, Puerto Rico
  12. 2.4 13 km SSE of Arroyo, Puerto Rico
  13. 2.5 3 km NW of Barahona, Puerto Rico
  14. 2.5 13 km S of Jobos, Puerto Rico
  15. 2.5 1 km WNW of Campanilla, 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 95 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.