QuakeIndex

Earthquake · reviewed by a seismologist

M 3.6md

37 km W of Stella, Puerto Rico

· 132 km deep · released about 3.7 tons of TNT

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10 km30 km60 km120 km N Mayagüez Municipio 37 kmRincón Municipio 38 kmAguada Municipio 45 kmAñasco Municipio 50 kmHormigueros Municipio 53 kmAguadilla Municipio 53 kmCabo Rojo Municipio 54 kmMoca Municipio 56 kmSan Germán Municipio 62 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 3.6 (md)
Depth
132 km below the surface
Felt
no reports yet
Nearest
Mayagüez Municipio, 37 km SW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 708 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 3.7 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.6 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 46,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 2,100× the energy of this one
  3. Magna, Utah 2020 M 5.7 1,500× the energy of this one
  4. This earthquake M 3.6 about 3.7 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 7.7× 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 18.2713, -67.6003. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Mayagüez Municipio, PR 37 km (23 mi) NE of here earthquakes near Mayagüez Municipio
Rincón Municipio, PR 38 km (23 mi) WSW of here earthquakes near Rincón Municipio
Aguada Municipio, PR 45 km (28 mi) WSW of here earthquakes near Aguada Municipio
Añasco Municipio, PR 50 km (31 mi) W of here earthquakes near Añasco Municipio
Hormigueros Municipio, PR 53 km (33 mi) WNW of here earthquakes near Hormigueros Municipio
Aguadilla Municipio, PR 53 km (33 mi) WSW of here earthquakes near Aguadilla Municipio

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

Aftershocks so far

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

  1. 2.6 13 km W of Puerto Real, Puerto Rico
  2. 3.2 40 km NW of Aguadilla, Puerto Rico
  3. 3.0 48 km WSW of Stella, Puerto Rico
  4. 2.8 22 km SW of Stella, Puerto Rico
  5. 3.4 37 km W of Rincón, Puerto Rico
  6. 2.5 24 km SW of Stella, Puerto Rico
  7. 3.4 29 km SW of Stella, Puerto Rico
  8. 3.3 56 km SE of Punta Cana, Dominican Republic
  9. 3.0 21 km NW of Rincón, Puerto Rico
  10. 3.4 25 km WSW of Stella, Puerto Rico
  11. 2.9 32 km W of Rincón, Puerto Rico
  12. 3.3 45 km W of Rincón, Puerto Rico
  13. 2.5 47 km ESE of Punta Cana, Dominican Republic
  14. 3.3 3 km WSW of Puerto Real, Puerto Rico
  15. 3.0 12 km NW of Puerto Real, 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 16 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.