QuakeIndex

Earthquake · reviewed by a seismologist

M 3.1md

55 km SW of Pole Ojea, Puerto Rico

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

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10 km30 km60 km120 km N Cabo Rojo Municipio 57 kmMayagüez Municipio 61 kmLajas Municipio 67 kmHormigueros Municipio 73 kmGuánica Municipio 76 kmSan Germán Municipio 77 kmSabana Grande Municipio 82 kmRincón Municipio 85 kmAñasco 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 3.1 (md)
Depth
44 km below the surface
Felt
no reports yet
Nearest
Cabo Rojo Municipio, 57 km NE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3260 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 6.7 230,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 10,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 7,400× 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 17.6305, -67.5598. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Cabo Rojo Municipio, PR 57 km (36 mi) SW of here earthquakes near Cabo Rojo Municipio
Mayagüez Municipio, PR 61 km (38 mi) SE of here earthquakes near Mayagüez Municipio
Lajas Municipio, PR 67 km (42 mi) SW of here earthquakes near Lajas Municipio
Hormigueros Municipio, PR 73 km (45 mi) SW of here earthquakes near Hormigueros Municipio
Guánica Municipio, PR 76 km (47 mi) WSW of here earthquakes near Guánica Municipio
San Germán Municipio, PR 77 km (48 mi) SW of here earthquakes near San Germán Municipio

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

Aftershocks so far

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

  1. 2.5 38 km S of Pole Ojea, Puerto Rico
  2. 3.2 78 km WSW of Pole Ojea, Puerto Rico
  3. 2.3 16 km SSW of Pole Ojea, Puerto Rico
  4. 3.1 85 km SW of Pole Ojea, Puerto Rico
  5. 2.2 26 km W of Pole Ojea, Puerto Rico
  6. 3.0 80 km W of Pole Ojea, Puerto Rico
  7. 2.3 43 km WSW of Pole Ojea, Puerto Rico
  8. 3.0 40 km SSW of Pole Ojea, Puerto Rico
  9. 2.0 23 km S of Pole Ojea, Puerto Rico
  10. 1.8 20 km SSW of Pole Ojea, Puerto Rico
  11. 2.6 24 km SSE of Pole Ojea, Puerto Rico
  12. 2.9 Puerto Rico region
  13. 2.1 9 km S of Pole Ojea, Puerto Rico
  14. 2.8 38 km W of Puerto Real, Puerto Rico
  15. 2.9 86 km WSW 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.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.