QuakeIndex

Earthquake · reviewed by a seismologist

M 3.1md

44 km WSW of Stella, Puerto Rico

· 68 km deep · released about 1,400 lb of TNT

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10 km30 km60 km120 km N Mayagüez Municipio 28 kmRincón Municipio 45 kmCabo Rojo Municipio 50 kmAguada Municipio 53 kmHormigueros Municipio 54 kmAñasco Municipio 54 kmAguadilla Municipio 63 kmSan Germán Municipio 63 kmMoca Municipio 63 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
68 km below the surface
Felt
no reports yet
Nearest
Mayagüez Municipio, 28 km WSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 693 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 1,400 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 6.7 240,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 11,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 7,700× the energy of this one
  4. This earthquake M 3.1 about 1,400 lb of TNT
  5. Around the size people start to feel M 3.0 this one released 1.5× 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 18.1552, -67.6280. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Mayagüez Municipio, PR 28 km (18 mi) ENE of here earthquakes near Mayagüez Municipio
Rincón Municipio, PR 45 km (28 mi) WSW of here earthquakes near Rincón Municipio
Cabo Rojo Municipio, PR 50 km (31 mi) WNW of here earthquakes near Cabo Rojo Municipio
Aguada Municipio, PR 53 km (33 mi) WSW of here earthquakes near Aguada Municipio
Hormigueros Municipio, PR 54 km (34 mi) W of here earthquakes near Hormigueros Municipio
Añasco Municipio, PR 54 km (34 mi) WSW of here earthquakes near Añasco 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. 3.8 67 km SE of Punta Cana, Dominican Republic
  2. 2.7 10 km WNW of Puerto Real, Puerto Rico
  3. 2.6 19 km SSW of Stella, Puerto Rico
  4. 3.1 25 km W of Puerto Real, Puerto Rico
  5. 3.0 16 km W of Rincón, Puerto Rico
  6. 2.8 25 km SW of Stella, Puerto Rico
  7. 3.1 8 km NNW of Puerto Real, Puerto Rico
  8. 3.3 13 km W of Mayagüez, Puerto Rico
  9. 3.0 27 km WNW of Rincón, Puerto Rico
  10. 3.7 49 km ESE of Punta Cana, Dominican Republic
  11. 2.9 23 km WNW of Rincón, Puerto Rico
  12. 2.6 13 km W of Puerto Real, Puerto Rico
  13. 3.0 48 km WSW of Stella, Puerto Rico
  14. 2.8 22 km SW of Stella, Puerto Rico
  15. 3.4 37 km W 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 86 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.