QuakeIndex

Earthquake · reviewed by a seismologist

M 3.3md

10 km SW of Stella, Puerto Rico

· 121 km deep · released about 1.3 tons of TNT

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10 km30 km60 km120 km N Rincón Municipio 12 kmAguada Municipio 19 kmAñasco Municipio 20 kmHormigueros Municipio 24 kmMoca Municipio 29 kmCabo Rojo Municipio 31 kmAguadilla Municipio 31 kmSan Germán Municipio 33 kmLas Marías Municipio 36 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
121 km below the surface
Felt
no reports yet
Nearest
Rincón Municipio, 12 km NNE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 904 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 1.3 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 6.7 130,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 5,600× the energy of this one
  3. Magna, Utah 2020 M 5.7 4,000× the energy of this one
  4. This earthquake M 3.3 about 1.3 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 2.8× 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 18.2488, -67.3130. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Rincón Municipio, PR 12 km (7 mi) SSW of here earthquakes near Rincón Municipio
Aguada Municipio, PR 19 km (12 mi) SW of here earthquakes near Aguada Municipio
Añasco Municipio, PR 20 km (12 mi) WSW of here earthquakes near Añasco Municipio
Hormigueros Municipio, PR 24 km (15 mi) WNW of here earthquakes near Hormigueros Municipio
Moca Municipio, PR 29 km (18 mi) WSW of here earthquakes near Moca Municipio
Cabo Rojo Municipio, PR 31 km (19 mi) NNW of here earthquakes near Cabo Rojo Municipio

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

Aftershocks so far

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

  1. 2.4 9 km NW of Puerto Real, Puerto Rico
  2. 2.5 6 km SSW of Lares, Puerto Rico
  3. 2.3 5 km ENE of La Parguera, Puerto Rico
  4. 2.4 3 km ENE of La Parguera, Puerto Rico
  5. 3.2 2 km E of La Parguera, Puerto Rico
  6. 1.9 5 km ENE of La Parguera, Puerto Rico
  7. 2.5 7 km WSW of Fuig, Puerto Rico
  8. 2.9 6 km W of Mayagüez, Puerto Rico
  9. 2.0 1 km SW of Palmarejo, Puerto Rico
  10. 2.6 2 km SE of Las Marías, Puerto Rico
  11. 2.5 5 km NE of Mayagüez, Puerto Rico
  12. 2.4 8 km SW of La Parguera, Puerto Rico
  13. 3.4 52 km W of Stella, Puerto Rico
  14. 2.0 3 km N of La Parguera, Puerto Rico
  15. 3.1 13 km N of San Antonio, 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 5.2 on 2020-01-15 — it released about 710 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.