QuakeIndex

Earthquake · reviewed by a seismologist

M 3.0md

4 km ENE of Guaynabo, Puerto Rico

· 116 km deep · released about 1,100 lb of TNT

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10 km30 km60 km120 km N Guaynabo Municipio 5 kmSan Juan Municipio 5 kmTrujillo Alto Municipio 9 kmBayamón Municipio 10 kmCataño Municipio 11 kmCarolina Municipio 11 kmAguas Buenas Municipio 14 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, 5 km SW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3340 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 1,100 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 6.7 320,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 14,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 10,000× the energy of this one
  4. This earthquake M 3.0 about 1,100 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 18.3741, -66.0748. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Guaynabo Municipio, PR 5 km (3 mi) NE of here earthquakes near Guaynabo Municipio
San Juan Municipio, PR 5 km (3 mi) S of here earthquakes near San Juan Municipio
Trujillo Alto Municipio, PR 9 km (5 mi) WNW of here earthquakes near Trujillo Alto Municipio
Bayamón Municipio, PR 10 km (6 mi) ENE of here earthquakes near Bayamón Municipio
Cataño Municipio, PR 11 km (7 mi) SE of here earthquakes near Cataño Municipio
Carolina Municipio, PR 11 km (7 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

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

  1. 2.7 7 km NW of Sumidero, Puerto Rico
  2. 2.8 7 km N of Tierras Nuevas Poniente, Puerto Rico
  3. 2.4 3 km S of Coco, Puerto Rico
  4. 2.7 30 km N of Loíza, Puerto Rico
  5. 1.7 20 km NNE of Luquillo, Puerto Rico
  6. 2.5 25 km NNE of Luquillo, Puerto Rico
  7. 2.6 1 km N of Pueblito del Rio, Puerto Rico
  8. 3.1 24 km NNW of Loíza, Puerto Rico
  9. 2.5 1 km ENE of Salinas, Puerto Rico
  10. 2.8 3 km N of San Juan, Puerto Rico
  11. 3.4 29 km N of Dorado, Puerto Rico
  12. 2.1 4 km SSE of Cayey, Puerto Rico
  13. 3.1 1 km NW of Bayamón, Puerto Rico
  14. 2.7 18 km NNE of Luquillo, Puerto Rico
  15. 2.3 1 km S of Río Lajas, 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.