QuakeIndex

Earthquake · reviewed by a seismologist

M 3.0md

8 km N of San Juan, Puerto Rico

· 108 km deep · released about 990 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Cataño Municipio 12 kmSan Juan Municipio 13 kmToa Baja Municipio 14 kmLoíza Municipio 19 kmDorado Municipio 19 kmCarolina Municipio 21 kmGuaynabo Municipio 22 kmBayamón Municipio 22 kmTrujillo Alto Municipio 24 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
108 km below the surface
Felt
no reports yet
Nearest
Cataño Municipio, 12 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1603 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 990 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 6.7 340,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 15,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 11,000× the energy of this one
  4. This earthquake M 3.0 about 990 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 18.5380, -66.0940. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Cataño Municipio, PR 12 km (7 mi) NNE of here earthquakes near Cataño Municipio
San Juan Municipio, PR 13 km (8 mi) NNW of here earthquakes near San Juan Municipio
Toa Baja Municipio, PR 14 km (9 mi) NE of here earthquakes near Toa Baja Municipio
Loíza Municipio, PR 19 km (12 mi) WNW of here earthquakes near Loíza Municipio
Dorado Municipio, PR 19 km (12 mi) ENE of here earthquakes near Dorado Municipio
Carolina Municipio, PR 21 km (13 mi) NW of here earthquakes near Carolina Municipio

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

Aftershocks so far

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

  1. 3.0 3 km E of Cayey, Puerto Rico
  2. 1.8 2 km SW of G. L. Garcia, Puerto Rico
  3. 2.7 4 km SE of Morovis, Puerto Rico
  4. 3.8 5 km ENE of San Juan, Puerto Rico
  5. 2.2 Puerto Rico region
  6. 2.6 2 km ENE of Bayamon, Puerto Rico
  7. 3.3 1 km S of Comerío, Puerto Rico
  8. 3.2 2 km ESE of Mucarabones, Puerto Rico
  9. 3.2 17 km N of Tierras Nuevas Poniente, Puerto Rico
  10. 3.0 4 km NNW of Vega Baja, Puerto Rico
  11. 2.0 0 km ENE of Parcelas La Milagrosa, Puerto Rico
  12. 3.2 3 km ENE of Guaynabo, Puerto Rico
  13. 2.3 3 km ESE of Comerío, Puerto Rico
  14. 1.8 3 km SW of Naranjito, Puerto Rico
  15. 2.7 41 km N of Suárez, 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 120 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.