QuakeIndex

Earthquake · reviewed by a seismologist

M 3.4md

63 km W of Rincón, Puerto Rico

· 105 km deep · released about 1.8 tons of TNT

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10 km30 km60 km120 km N Mayagüez Municipio 19 kmRincón Municipio 63 kmAguada Municipio 71 kmCabo Rojo Municipio 75 kmAñasco Municipio 75 kmHormigueros Municipio 78 kmAguadilla Municipio 78 kmMoca Municipio 82 kmSan Germán Municipio 86 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 3.4 (md)
Depth
105 km below the surface
Felt
no reports yet
Nearest
Mayagüez Municipio, 19 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1315 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 1.8 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.4 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 92,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 4,100× the energy of this one
  3. Magna, Utah 2020 M 5.7 2,900× the energy of this one
  4. This earthquake M 3.4 about 1.8 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 3.8× 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 18.2467, -67.8422. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Mayagüez Municipio, PR 19 km (12 mi) NNE of here earthquakes near Mayagüez Municipio
Rincón Municipio, PR 63 km (39 mi) W of here earthquakes near Rincón Municipio
Aguada Municipio, PR 71 km (44 mi) WSW of here earthquakes near Aguada Municipio
Cabo Rojo Municipio, PR 75 km (47 mi) WNW of here earthquakes near Cabo Rojo Municipio
Añasco Municipio, PR 75 km (47 mi) W of here earthquakes near Añasco Municipio
Hormigueros Municipio, PR 78 km (48 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

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

  1. 2.8 17 km WNW of Rincón, Puerto Rico
  2. 3.3 Mona Passage
  3. 2.4 21 km SW of Stella, Puerto Rico
  4. 3.4 51 km W of Rincón, Puerto Rico
  5. 3.0 33 km WNW of Rincón, Puerto Rico
  6. 3.2 47 km WSW of Stella, Puerto Rico
  7. 3.2 48 km WSW of Stella, Puerto Rico
  8. 3.8 47 km ESE of Boca de Yuma, Dominican Republic
  9. 2.7 24 km WSW of Stella, Puerto Rico
  10. 2.9 44 km WSW of Stella, Puerto Rico
  11. 3.2 58 km W of Puerto Real, Puerto Rico
  12. 3.5 45 km WSW of Stella, Puerto Rico
  13. 4.0 59 km SE of Boca de Yuma, Dominican Republic
  14. 3.2 80 km SE of Boca de Yuma, Dominican Republic
  15. 3.4 56 km W of Pole Ojea, 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 4.5 on 2021-10-14 — it released about 39 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.