QuakeIndex

Earthquake · reviewed by a seismologist

M 3.0md

26 km N of Garrochales, Puerto Rico

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

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10 km30 km60 km120 km N Barceloneta Municipio 25 kmArecibo Municipio 29 kmManatí Municipio 30 kmHatillo Municipio 34 kmVega Baja Municipio 34 kmFlorida Municipio 36 kmCamuy Municipio 38 kmVega Alta Municipio 40 kmQuebradillas Municipio 42 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
8.5 km below the surface
Felt
no reports yet
Nearest
Barceloneta Municipio, 25 km SSE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 460 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 18.6872, -66.6077. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Barceloneta Municipio, PR 25 km (15 mi) NNW of here earthquakes near Barceloneta Municipio
Arecibo Municipio, PR 29 km (18 mi) NNE of here earthquakes near Arecibo Municipio
Manatí Municipio, PR 30 km (18 mi) NNW of here earthquakes near Manatí Municipio
Hatillo Municipio, PR 34 km (21 mi) NE of here earthquakes near Hatillo Municipio
Vega Baja Municipio, PR 34 km (21 mi) NW of here earthquakes near Vega Baja Municipio
Florida Municipio, PR 36 km (22 mi) N of here earthquakes near Florida Municipio

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

Aftershocks so far

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

  1. 3.0 3 km SW of Vega Alta, Puerto Rico
  2. 3.0 44 km N of Arecibo, Puerto Rico
  3. 3.1 41 km N of Arecibo, Puerto Rico
  4. 2.6 13 km N of Arecibo, Puerto Rico
  5. 3.7 57 km N of Brenas, Puerto Rico
  6. 3.0 37 km N of Isabela, Puerto Rico
  7. 3.0 1 km SE of Coto Norte, Puerto Rico
  8. 3.0 70 km N of Tierras Nuevas Poniente, Puerto Rico
  9. 2.6 21 km NNE of Dorado, Puerto Rico
  10. 2.5 13 km N of Quebradillas, Puerto Rico
  11. 3.6 20 km N of Dorado, Puerto Rico
  12. 2.0 6 km ENE of Utuado, Puerto Rico
  13. 3.2 45 km N of Carrizales, Puerto Rico
  14. 3.2 6 km NNW of Arecibo, Puerto Rico
  15. 2.8 69 km N of Tierras Nuevas Poniente, 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 4.8 on 2017-08-18 — it released about 450 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.