QuakeIndex

Earthquake · reviewed by a seismologist

M 3.4md

28 km WNW of Rincón, Puerto Rico

· 8.9 km deep · released about 1.7 tons of TNT

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10 km30 km60 km120 km N Rincón Municipio 29 kmAguada Municipio 35 kmAguadilla Municipio 40 kmAñasco Municipio 42 kmMoca Municipio 46 kmHormigueros Municipio 51 kmMayagüez Municipio 53 kmIsabela Municipio 54 kmCabo Rojo Municipio 57 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
8.9 km below the surface
Felt
2 reports · strongest reported intensity III
Nearest
Rincón Municipio, 29 km ESE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 337 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 2 people have reported feeling it to USGS.

How big was it?

This earthquake released about 1.7 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 6.7 100,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 4,600× the energy of this one
  3. Magna, Utah 2020 M 5.7 3,200× the energy of this one
  4. This earthquake M 3.4 about 1.7 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 3.5× 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 18.3990, -67.5133. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Rincón Municipio, PR 29 km (18 mi) WNW of here earthquakes near Rincón Municipio
Aguada Municipio, PR 35 km (22 mi) W of here earthquakes near Aguada Municipio
Aguadilla Municipio, PR 40 km (25 mi) WSW of here earthquakes near Aguadilla Municipio
Añasco Municipio, PR 42 km (26 mi) WNW of here earthquakes near Añasco Municipio
Moca Municipio, PR 46 km (28 mi) W of here earthquakes near Moca Municipio
Hormigueros Municipio, PR 51 km (32 mi) NW of here earthquakes near Hormigueros Municipio

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

Aftershocks so far

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

  1. 3.1 32 km W of Rincón, Puerto Rico
  2. 3.3 33 km NW of San Antonio, Puerto Rico
  3. 2.7 30 km W of Puerto Real, Puerto Rico
  4. 3.2 56 km WSW of Stella, Puerto Rico
  5. 2.5 3 km SW of Luyando, Puerto Rico
  6. 2.3 3 km NNW of Cabo Rojo, Puerto Rico
  7. 3.7 13 km WNW of Aguadilla, Puerto Rico
  8. 3.7 48 km WSW of Stella, Puerto Rico
  9. 2.6 9 km NNW of Puerto Real, Puerto Rico
  10. 3.4 61 km ESE of Punta Cana, Dominican Republic
  11. 3.2 6 km NNW of Rincón, Puerto Rico
  12. 2.9 12 km NW of Puerto Real, Puerto Rico
  13. 3.8 60 km W of Rincón, Puerto Rico
  14. 3.5 64 km W of Stella, Puerto Rico
  15. 3.2 54 km WSW of Stella, 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 36 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.