QuakeIndex

Earthquake · reviewed by a seismologist

M 3.0md

0 km WNW of Candelaria, Puerto Rico

· 66 km deep · released about 830 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Toa Alta Municipio 6 kmToa Baja Municipio 6 kmBayamón Municipio 8 kmCataño Municipio 8 kmDorado Municipio 9 kmGuaynabo Municipio 13 kmVega Alta Municipio 13 kmNaranjito Municipio 14 kmSan Juan 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 3.0 (md)
Depth
66 km below the surface
Felt
1 report · strongest reported intensity II
Nearest
Toa Alta Municipio, 6 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 699 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 830 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 6.7 410,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 18,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 13,000× the energy of this one
  4. This earthquake M 3.0 about 830 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 18.4068, -66.2175. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Toa Alta Municipio, PR 6 km (3 mi) NNE of here earthquakes near Toa Alta Municipio
Toa Baja Municipio, PR 6 km (4 mi) SSW of here earthquakes near Toa Baja Municipio
Bayamón Municipio, PR 8 km (5 mi) NW of here earthquakes near Bayamón Municipio
Cataño Municipio, PR 8 km (5 mi) WSW of here earthquakes near Cataño Municipio
Dorado Municipio, PR 9 km (6 mi) SSE of here earthquakes near Dorado Municipio
Guaynabo Municipio, PR 13 km (8 mi) WNW of here earthquakes near Guaynabo Municipio

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

Aftershocks so far

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

  1. 3.0 27 km NNE of Brenas, Puerto Rico
  2. 2.1 1 km NW of Humacao, Puerto Rico
  3. 3.4 4 km SE of G. L. Garcia, Puerto Rico
  4. 2.2 4 km NW of Orocovis, Puerto Rico
  5. 2.8 4 km WNW of Candelero Arriba, Puerto Rico
  6. 2.0 3 km E of Santa Clara, Puerto Rico
  7. 3.2 34 km NNE of San Juan, Puerto Rico
  8. 3.0 11 km NNW of San Juan, Puerto Rico
  9. 2.8 19 km NNE of San Juan, Puerto Rico
  10. 2.2 2 km E of Cayey, Puerto Rico
  11. 3.0 23 km N of Tierras Nuevas Poniente, Puerto Rico
  12. 2.0 4 km NNW of Jobos, Puerto Rico
  13. 2.5 5 km NNW of Jagual, Puerto Rico
  14. 3.3 2 km NNW of La Luisa, Puerto Rico
  15. 1.8 4 km NNW of Yaurel, 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 4.4 on 2018-12-09 — it released about 140 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.