QuakeIndex

Earthquake · reviewed by a seismologist

M 3.1md

41 km NW of Rincón, Puerto Rico

· 9.2 km deep · released about 1,200 lb of TNT

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10 km30 km60 km120 km N Rincón Municipio 41 kmAguadilla Municipio 44 kmAguada Municipio 44 kmMoca Municipio 54 kmAñasco Municipio 55 kmIsabela Municipio 58 kmMayagüez Municipio 65 kmQuebradillas Municipio 67 kmHormigueros Municipio 67 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 3.1 (md)
Depth
9.2 km below the surface
Felt
no reports yet
Nearest
Rincón Municipio, 41 km SE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 905 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 1,200 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.1 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 280,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 12,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 8,800× the energy of this one
  4. This earthquake M 3.1 about 1,200 lb of TNT
  5. Around the size people start to feel M 3.0 this one released 1.3× 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 18.5735, -67.5520. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Rincón Municipio, PR 41 km (26 mi) NW of here earthquakes near Rincón Municipio
Aguadilla Municipio, PR 44 km (28 mi) WNW of here earthquakes near Aguadilla Municipio
Aguada Municipio, PR 44 km (28 mi) WNW of here earthquakes near Aguada Municipio
Moca Municipio, PR 54 km (34 mi) WNW of here earthquakes near Moca Municipio
Añasco Municipio, PR 55 km (34 mi) NW of here earthquakes near Añasco Municipio
Isabela Municipio, PR 58 km (36 mi) W of here earthquakes near Isabela Municipio

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

Aftershocks so far

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

  1. 3.4 8 km WNW of San Antonio, Puerto Rico
  2. 3.3 15 km SSW of Stella, Puerto Rico
  3. 3.8 9 km SW of Stella, Puerto Rico
  4. 3.2 80 km NW of San Antonio, Puerto Rico
  5. 3.4 16 km NW of Rincón, Puerto Rico
  6. 3.0 38 km NW of San Antonio, Puerto Rico
  7. 2.9 21 km W of Rincón, Puerto Rico
  8. 3.0 27 km NW of San Antonio, Puerto Rico
  9. 2.8 24 km WNW of Rincón, Puerto Rico
  10. 2.9 15 km SW of Stella, Puerto Rico
  11. 2.9 22 km NW of San Antonio, Puerto Rico
  12. 3.0 10 km WSW of Stella, Puerto Rico
  13. 3.3 1 km WNW of Aguada, Puerto Rico
  14. 3.0 14 km WNW of Rincón, Puerto Rico
  15. 2.6 23 km SW 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 4.6 on 2020-01-29 — it released about 200 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.