QuakeIndex

Earthquake · reviewed by a seismologist

M 2.9md

38 km WSW of Stella, Puerto Rico

· 138 km deep · released about 780 lb of TNT

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10 km30 km60 km120 km N Mayagüez Municipio 36 kmRincón Municipio 39 kmCabo Rojo Municipio 42 kmHormigueros Municipio 46 kmAguada Municipio 47 kmAñasco Municipio 48 kmSan Germán Municipio 55 kmMoca Municipio 57 kmLajas 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 2.9 (md)
Depth
138 km below the surface
Felt
no reports yet
Nearest
Mayagüez Municipio, 36 km W
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3330 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 780 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 19,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 14,000× the energy of this one
  3. Around the size people start to feel M 3.0 1.2× the energy of this one
  4. This earthquake M 2.9 about 780 lb of TNT

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 18.1351, -67.5540. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Mayagüez Municipio, PR 36 km (22 mi) E of here earthquakes near Mayagüez Municipio
Rincón Municipio, PR 39 km (24 mi) SW of here earthquakes near Rincón Municipio
Cabo Rojo Municipio, PR 42 km (26 mi) WNW of here earthquakes near Cabo Rojo Municipio
Hormigueros Municipio, PR 46 km (29 mi) W of here earthquakes near Hormigueros Municipio
Aguada Municipio, PR 47 km (29 mi) SW of here earthquakes near Aguada Municipio
Añasco Municipio, PR 48 km (30 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

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

  1. 2.8 71 km W of Pole Ojea, Puerto Rico
  2. 2.3 33 km W of Stella, Puerto Rico
  3. 1.5 3 km ESE of Boquerón, Puerto Rico
  4. 2.3 34 km W of Puerto Real, Puerto Rico
  5. 2.6 28 km W of Puerto Real, Puerto Rico
  6. 2.6 22 km WNW of Rincón, Puerto Rico
  7. 2.3 1 km E of Pole Ojea, Puerto Rico
  8. 3.4 70 km SE of Punta Cana, Dominican Republic
  9. 1.6 2 km S of Cabo Rojo, Puerto Rico
  10. 2.3 31 km WSW of Stella, Puerto Rico
  11. 2.1 3 km SSE of Pole Ojea, Puerto Rico
  12. 2.4 32 km WSW of Stella, Puerto Rico
  13. 2.6 8 km WNW of Puerto Real, Puerto Rico
  14. 2.5 6 km W of Hormigueros, Puerto Rico
  15. 3.6 67 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.

On USGS

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