QuakeIndex

Earthquake · reviewed by a seismologist

M 2.9md

0 km NNW of Cataño, Puerto Rico

· 84 km deep · released about 630 lb of TNT

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10 km30 km60 km120 km N Cataño Municipio 3 kmSan Juan Municipio 6 kmToa Baja Municipio 8 kmGuaynabo Municipio 11 kmBayamón Municipio 12 kmDorado Municipio 15 kmToa Alta Municipio 16 kmCarolina Municipio 17 kmTrujillo Alto 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 2.9 (md)
Depth
84 km below the surface
Felt
1 report · strongest reported intensity II
Nearest
Cataño Municipio, 3 km W
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1212 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 1 person has reported feeling it to USGS.

How big was it?

This earthquake released about 630 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 24,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 17,000× the energy of this one
  3. Around the size people start to feel M 3.0 1.5× the energy of this one
  4. This earthquake M 2.9 about 630 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 18.4468, -66.1220. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Cataño Municipio, PR 3 km (2 mi) E of here earthquakes near Cataño Municipio
San Juan Municipio, PR 6 km (4 mi) WNW of here earthquakes near San Juan Municipio
Toa Baja Municipio, PR 8 km (5 mi) E of here earthquakes near Toa Baja Municipio
Guaynabo Municipio, PR 11 km (7 mi) N of here earthquakes near Guaynabo Municipio
Bayamón Municipio, PR 12 km (7 mi) NNE of here earthquakes near Bayamón Municipio
Dorado Municipio, PR 15 km (9 mi) ESE of here earthquakes near Dorado Municipio

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

Aftershocks so far

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

  1. 2.8 1 km SSW of Cidra, Puerto Rico
  2. 2.3 Puerto Rico region
  3. 3.2 2 km NNW of San Juan, Puerto Rico
  4. 3.3 4 km ENE of Guaynabo, Puerto Rico
  5. 2.6 8 km S of Orocovis, Puerto Rico
  6. 3.3 Puerto Rico region
  7. 1.9 8 km ENE of Villalba, Puerto Rico
  8. 2.1 Puerto Rico region
  9. 2.8 5 km NNW of Brenas, Puerto Rico
  10. 2.6 2 km WNW of Bayamon, Puerto Rico
  11. 2.9 2 km NNE of Parcelas La Milagrosa, Puerto Rico
  12. 2.7 1 km W of Juncos, Puerto Rico
  13. 3.0 Puerto Rico region
  14. 3.2 6 km N of San Juan, Puerto Rico
  15. 3.0 Puerto Rico region

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 4.4 on 2018-12-09 — it released about 190 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.