QuakeIndex

Earthquake · reviewed by a seismologist

M 3.5md

2 km SSE of Boquerón, Puerto Rico

· 7.0 km deep · released about 2.9 tons of TNT

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10 km30 km60 km120 km N Cabo Rojo Municipio 3 kmLajas Municipio 13 kmHormigueros Municipio 15 kmSan Germán Municipio 17 kmSabana Grande Municipio 24 kmGuánica Municipio 26 kmMaricao Municipio 30 kmLas Marías Municipio 31 kmAñasco 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 3.5 (md)
Depth
7.0 km below the surface
Felt
3 reports · strongest reported intensity IV
Nearest
Cabo Rojo Municipio, 3 km WSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1265 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 3 people have reported feeling it to USGS.

How big was it?

This earthquake released about 2.9 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 59,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 2,600× the energy of this one
  3. Magna, Utah 2020 M 5.7 1,900× the energy of this one
  4. This earthquake M 3.5 about 2.9 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 6× 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 18.0070, -67.1566. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Cabo Rojo Municipio, PR 3 km (2 mi) ENE of here earthquakes near Cabo Rojo Municipio
Lajas Municipio, PR 13 km (8 mi) WNW of here earthquakes near Lajas Municipio
Hormigueros Municipio, PR 15 km (9 mi) SSW of here earthquakes near Hormigueros Municipio
San Germán Municipio, PR 17 km (10 mi) SW of here earthquakes near San Germán Municipio
Sabana Grande Municipio, PR 24 km (15 mi) WSW of here earthquakes near Sabana Grande Municipio
Guánica Municipio, PR 26 km (16 mi) WNW of here earthquakes near Guánica Municipio

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

Aftershocks so far

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

  1. 1.9 7 km ESE of La Parguera, Puerto Rico
  2. 1.9 2 km N of Guayanilla, Puerto Rico
  3. 1.7 2 km WSW of Indios, Puerto Rico
  4. 2.7 2 km N of Guayanilla, Puerto Rico
  5. 2.5 3 km E of Hormigueros, Puerto Rico
  6. 2.3 2 km NW of Tallaboa, Puerto Rico
  7. 2.6 7 km WSW of Guánica, Puerto Rico
  8. 2.3 1 km SSW of Yauco, Puerto Rico
  9. 2.3 Puerto Rico region
  10. 3.0 Puerto Rico region
  11. 2.8 11 km S of Guánica, Puerto Rico
  12. 2.5 7 km SW of Guánica, Puerto Rico
  13. 2.3 3 km SSW of Indios, Puerto Rico
  14. 2.4 7 km SSW of Tallaboa, Puerto Rico
  15. 2.6 6 km SSW of Indios, 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 6.4 on 2020-01-07 — it released about 21,000 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.