QuakeIndex

Earthquake · reviewed by a seismologist

M 2.9Md

10 km W of Mayagüez, Puerto Rico

· 90 km deep · released about 680 lb of TNT

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10 km30 km60 km120 km N Añasco Municipio 15 kmHormigueros Municipio 15 kmRincón Municipio 15 kmAguada Municipio 20 kmSan Germán Municipio 24 kmCabo Rojo Municipio 24 kmMoca Municipio 26 kmLas Marías Municipio 28 kmSan Sebastián Municipio 32 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
90 km below the surface
Felt
1 report · strongest reported intensity III
Nearest
Añasco Municipio, 15 km NE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3420 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 1 person has reported feeling it to USGS.

How big was it?

This earthquake released about 680 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 22,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 16,000× the energy of this one
  3. Around the size people start to feel M 3.0 1.4× the energy of this one
  4. This earthquake M 2.9 about 680 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 18.2035, -67.2378. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Añasco Municipio, PR 15 km (9 mi) SW of here earthquakes near Añasco Municipio
Hormigueros Municipio, PR 15 km (9 mi) WNW of here earthquakes near Hormigueros Municipio
Rincón Municipio, PR 15 km (9 mi) S of here earthquakes near Rincón Municipio
Aguada Municipio, PR 20 km (12 mi) SSW of here earthquakes near Aguada Municipio
San Germán Municipio, PR 24 km (15 mi) WNW of here earthquakes near San Germán Municipio
Cabo Rojo Municipio, PR 24 km (15 mi) NNW of here earthquakes near Cabo Rojo 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. 1.8 12 km SSW of La Parguera, Puerto Rico
  2. 2.5 4 km WSW of Las Marías, Puerto Rico
  3. 2.6 34 km NW of Rincón, Puerto Rico
  4. 2.3 0 km WNW of Liborio Negron Torres, Puerto Rico
  5. 2.2 9 km WNW of Puerto Real, Puerto Rico
  6. 2.0 6 km SSW of Palmarejo, Puerto Rico
  7. 3.0 45 km W of Rincón, Puerto Rico
  8. 2.0 12 km S of La Parguera, Puerto Rico
  9. 1.9 5 km SW of Palmarejo, Puerto Rico
  10. 1.9 33 km NW of Rincón, Puerto Rico
  11. 1.9 36 km NW of Rincón, Puerto Rico
  12. 2.8 38 km WNW of Rincón, Puerto Rico
  13. 3.0 42 km W of Rincón, Puerto Rico
  14. 3.0 33 km W of Rincón, Puerto Rico
  15. 2.9 38 km WNW 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.

On USGS

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