QuakeIndex

Earthquake · reviewed by a seismologist

M 3.5md

43 km WSW of Stella, Puerto Rico

· 144 km deep · released about 2.6 tons of TNT

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10 km30 km60 km120 km N Mayagüez Municipio 29 kmRincón Municipio 43 kmAguada Municipio 51 kmCabo Rojo Municipio 53 kmAñasco Municipio 54 kmHormigueros Municipio 55 kmAguadilla Municipio 61 kmMoca Municipio 62 kmSan Germán Municipio 64 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
144 km below the surface
Felt
no reports yet
Nearest
Mayagüez Municipio, 29 km WSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2069 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 2.6 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 65,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 2,900× the energy of this one
  3. Magna, Utah 2020 M 5.7 2,100× the energy of this one
  4. This earthquake M 3.5 about 2.6 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 5.4× 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 18.1938, -67.6333. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Mayagüez Municipio, PR 29 km (18 mi) ENE of here earthquakes near Mayagüez Municipio
Rincón Municipio, PR 43 km (27 mi) WSW of here earthquakes near Rincón Municipio
Aguada Municipio, PR 51 km (32 mi) WSW of here earthquakes near Aguada Municipio
Cabo Rojo Municipio, PR 53 km (33 mi) WNW of here earthquakes near Cabo Rojo Municipio
Añasco Municipio, PR 54 km (34 mi) W of here earthquakes near Añasco Municipio
Hormigueros Municipio, PR 55 km (34 mi) W of here earthquakes near Hormigueros Municipio

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

Aftershocks so far

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

  1. 3.1 24 km W of Rincón, Puerto Rico
  2. 3.4 54 km WSW of Stella, Puerto Rico
  3. 3.5 50 km WSW of Stella, Puerto Rico
  4. 3.6 75 km W of Puerto Real, Puerto Rico
  5. 2.6 14 km SW of Stella, Puerto Rico
  6. 2.9 24 km W of Rincón, Puerto Rico
  7. 2.9 15 km NW of Puerto Real, Puerto Rico
  8. 2.6 16 km WNW of Puerto Real, Puerto Rico
  9. 3.3 58 km SE of Punta Cana, Dominican Republic
  10. 3.1 36 km WSW of Stella, Puerto Rico
  11. 3.3 46 km ESE of Punta Cana, Dominican Republic
  12. 2.8 16 km WNW of Puerto Real, Puerto Rico
  13. 2.5 27 km NNW of Rincón, Puerto Rico
  14. 3.3 48 km E of Punta Cana, Dominican Republic
  15. 3.2 60 km WNW of Rincón, 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 2017-10-01 — it released about 23 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.