QuakeIndex

Earthquake · reviewed by a seismologist

M 3.3md

11 km W of Mayagüez, Puerto Rico

· 106 km deep · released about 1.4 tons of TNT

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10 km30 km60 km120 km N Hormigueros Municipio 15 kmAñasco Municipio 16 kmRincón Municipio 17 kmAguada Municipio 22 kmCabo Rojo Municipio 22 kmSan Germán Municipio 24 kmMoca Municipio 28 kmLas Marías Municipio 29 kmLajas Municipio 32 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 3.3 (md)
Depth
106 km below the surface
Felt
no reports yet
Nearest
Hormigueros Municipio, 15 km ESE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1475 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 1.4 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.3 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 120,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 5,400× the energy of this one
  3. Magna, Utah 2020 M 5.7 3,800× the energy of this one
  4. This earthquake M 3.3 about 1.4 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 2.9× 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 18.1882, -67.2475. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Hormigueros Municipio, PR 15 km (9 mi) WNW of here earthquakes near Hormigueros Municipio
Añasco Municipio, PR 16 km (10 mi) SW of here earthquakes near Añasco Municipio
Rincón Municipio, PR 17 km (10 mi) S of here earthquakes near Rincón Municipio
Aguada Municipio, PR 22 km (14 mi) SSW of here earthquakes near Aguada Municipio
Cabo Rojo Municipio, PR 22 km (14 mi) NNW of here earthquakes near Cabo Rojo Municipio
San Germán Municipio, PR 24 km (15 mi) WNW of here earthquakes near San Germán Municipio

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

Aftershocks so far

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

  1. 2.6 5 km SW of Guánica, Puerto Rico
  2. 1.8 3 km SE of La Parguera, Puerto Rico
  3. 2.1 3 km E of Pole Ojea, Puerto Rico
  4. 2.1 3 km WSW of Indios, Puerto Rico
  5. 1.8 1 km W of Guánica, Puerto Rico
  6. 2.1 4 km SE of Maria Antonia, Puerto Rico
  7. 2.3 1 km N of Yauco, Puerto Rico
  8. 2.1 2 km SE of La Parguera, Puerto Rico
  9. 2.2 4 km SSW of Indios, Puerto Rico
  10. 2.3 Puerto Rico region
  11. 2.6 4 km SSW of La Parguera, Puerto Rico
  12. 2.5 3 km WSW of Gu?nica, Puerto Rico
  13. 2.3 2 km S of Guánica, Puerto Rico
  14. 2.3 3 km SSW of La Parguera, Puerto Rico
  15. 1.9 8 km S of Guánica, 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 5.9 on 2020-01-11 — it released about 7,700 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.