QuakeIndex

Earthquake · reviewed by a seismologist

M 3.5md

20 km W of Puerto Real, Puerto Rico

· 35 km deep · released about 2.3 tons of TNT

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10 km30 km60 km120 km N Cabo Rojo Municipio 23 kmHormigueros Municipio 28 kmRincón Municipio 30 kmAñasco Municipio 34 kmSan Germán Municipio 36 kmAguada Municipio 37 kmLajas Municipio 38 kmMoca Municipio 45 kmLas Marías Municipio 45 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 3.5 (md)
Depth
35 km below the surface
Felt
no reports yet
Nearest
Cabo Rojo Municipio, 23 km ESE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 878 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 2.3 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.5 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 72,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 3,200× the energy of this one
  3. Magna, Utah 2020 M 5.7 2,300× the energy of this one
  4. This earthquake M 3.5 about 2.3 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 4.9× 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 18.0936, -67.3768. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Cabo Rojo Municipio, PR 23 km (14 mi) WNW of here earthquakes near Cabo Rojo Municipio
Hormigueros Municipio, PR 28 km (17 mi) W of here earthquakes near Hormigueros Municipio
Rincón Municipio, PR 30 km (19 mi) SSW of here earthquakes near Rincón Municipio
Añasco Municipio, PR 34 km (21 mi) SW of here earthquakes near Añasco Municipio
San Germán Municipio, PR 36 km (22 mi) W of here earthquakes near San Germán Municipio
Aguada Municipio, PR 37 km (23 mi) SSW of here earthquakes near Aguada Municipio

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

Aftershocks so far

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

  1. 2.3 6 km WSW of La Parguera, Puerto Rico
  2. 2.0 9 km SW of Guánica, Puerto Rico
  3. 2.7 5 km WSW of Guánica, Puerto Rico
  4. 2.3 9 km SSW of Guánica, Puerto Rico
  5. 2.2 3 km SW of La Parguera, Puerto Rico
  6. 3.0 3 km WSW of La Parguera, Puerto Rico
  7. 2.1 0 km E of Sabana Grande, Puerto Rico
  8. 3.2 57 km W of Puerto Real, Puerto Rico
  9. 2.3 2 km SSW of Liborio Negron Torres, Puerto Rico
  10. 2.1 2 km WSW of Sabana Grande, Puerto Rico
  11. 3.4 3 km WSW of Sabana Grande, Puerto Rico
  12. 2.8 7 km ESE of La Parguera, Puerto Rico
  13. 3.1 6 km W of Maricao, Puerto Rico
  14. 3.5 24 km W of Pole Ojea, Puerto Rico
  15. 2.4 3 km WSW of La Parguera, 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 5.3 on 2020-07-03 — it released about 580 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.