QuakeIndex

Earthquake · reviewed by a seismologist

M 3.0md

2 km ENE of Guaynabo, Puerto Rico

· 116 km deep · released about 830 lb of TNT

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10 km30 km60 km120 km N Guaynabo Municipio 4 kmSan Juan Municipio 7 kmTrujillo Alto Municipio 9 kmBayamón Municipio 9 kmCataño Municipio 11 kmCarolina Municipio 13 kmAguas Buenas Municipio 13 kmGurabo Municipio 15 kmToa Baja 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
116 km below the surface
Felt
no reports yet
Nearest
Guaynabo Municipio, 4 km SW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2760 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 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 18.3640, -66.0835. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Guaynabo Municipio, PR 4 km (2 mi) NE of here earthquakes near Guaynabo Municipio
San Juan Municipio, PR 7 km (4 mi) SSW of here earthquakes near San Juan Municipio
Trujillo Alto Municipio, PR 9 km (6 mi) WNW of here earthquakes near Trujillo Alto Municipio
Bayamón Municipio, PR 9 km (6 mi) E of here earthquakes near Bayamón Municipio
Cataño Municipio, PR 11 km (7 mi) SE of here earthquakes near Cataño Municipio
Carolina Municipio, PR 13 km (8 mi) WSW of here earthquakes near Carolina Municipio

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

Aftershocks so far

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

  1. 2.3 1 km E of Cidra, Puerto Rico
  2. 2.0 3 km E of Naranjito, Puerto Rico
  3. 2.5 1 km SSW of Bayamon, Puerto Rico
  4. 1.9 5 km SE of Arroyo, Puerto Rico
  5. 2.6 Puerto Rico region
  6. 1.7 1 km NW of Parcelas Peñuelas, Puerto Rico
  7. 1.8 1 km NW of Aguas Buenas, Puerto Rico
  8. 2.0 Puerto Rico region
  9. 2.9 3 km N of Naranjito, Puerto Rico
  10. 1.6 1 km ESE of Los Llanos, Puerto Rico
  11. 2.1 5 km SSE of Arroyo, Puerto Rico
  12. 1.9 4 km N of Palmarejo, Puerto Rico
  13. 2.2 26 km N of Dorado, Puerto Rico
  14. 1.6 5 km SE of Arroyo, Puerto Rico
  15. 2.3 4 km NW of Palomas, 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.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.