QuakeIndex

Earthquake · reviewed by a seismologist

M 3.2md

10 km NNW of Garrochales, Puerto Rico

· 94 km deep · released about 1,700 lb of TNT

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10 km30 km60 km120 km N Barceloneta Municipio 9 kmArecibo Municipio 13 kmManatí Municipio 16 kmFlorida Municipio 19 kmHatillo Municipio 23 kmVega Baja Municipio 24 kmCiales Municipio 29 kmCamuy Municipio 29 kmVega Alta Municipio 31 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 3.2 (md)
Depth
94 km below the surface
Felt
no reports yet
Nearest
Barceloneta Municipio, 9 km SE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 673 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 1,700 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.2 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 200,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 8,800× the energy of this one
  3. Magna, Utah 2020 M 5.7 6,200× the energy of this one
  4. This earthquake M 3.2 about 1,700 lb of TNT
  5. Around the size people start to feel M 3.0 this one released 1.8× more

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 18.5375, -66.6087. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Barceloneta Municipio, PR 9 km (6 mi) NW of here earthquakes near Barceloneta Municipio
Arecibo Municipio, PR 13 km (8 mi) NNE of here earthquakes near Arecibo Municipio
Manatí Municipio, PR 16 km (10 mi) NW of here earthquakes near Manatí Municipio
Florida Municipio, PR 19 km (12 mi) NNW of here earthquakes near Florida Municipio
Hatillo Municipio, PR 23 km (14 mi) ENE of here earthquakes near Hatillo Municipio
Vega Baja Municipio, PR 24 km (15 mi) WNW of here earthquakes near Vega Baja Municipio

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

Aftershocks so far

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

  1. 3.1 5 km SSW of Adjuntas, Puerto Rico
  2. 2.7 16 km NNW of Garrochales, Puerto Rico
  3. 3.0 1 km NNW of Ingenio, Puerto Rico
  4. 2.3 10 km W of Adjuntas, Puerto Rico
  5. 3.1 1 km S of Toa Alta, Puerto Rico
  6. 3.0 34 km N of Tierras Nuevas Poniente, Puerto Rico
  7. 2.9 19 km NNE of Carrizales, Puerto Rico
  8. 3.0 20 km N of Hatillo, Puerto Rico
  9. 2.9 12 km E of Maricao, Puerto Rico
  10. 2.8 9 km N of Carrizales, Puerto Rico
  11. 3.5 5 km E of Villalba, Puerto Rico
  12. 2.4 9 km WSW of Adjuntas, Puerto Rico
  13. 2.4 8 km ESE of Adjuntas, Puerto Rico
  14. 2.3 5 km NW of Orocovis, Puerto Rico
  15. 2.0 5 km NNW of Orocovis, 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 70 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.