QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1md

18 km W of Puerto Real, Puerto Rico

· 23 km deep · released about 37 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Cabo Rojo Municipio 22 kmHormigueros Municipio 26 kmRincón Municipio 30 kmAñasco Municipio 33 kmSan Germán Municipio 34 kmLajas Municipio 36 kmAguada Municipio 37 kmLas Marías Municipio 43 kmMoca Municipio 44 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 2.1 (md)
Depth
23 km below the surface
Felt
no reports yet
Nearest
Cabo Rojo Municipio, 22 km ESE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3425 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

How big was it?

This earthquake released about 37 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.1 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 410,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 290,000× the energy of this one
  3. Around the size people start to feel M 3.0 26× the energy of this one
  4. This earthquake M 2.1 about 37 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 18.0935, -67.3628. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Cabo Rojo Municipio, PR 22 km (14 mi) WNW of here earthquakes near Cabo Rojo Municipio
Hormigueros Municipio, PR 26 km (16 mi) W of here earthquakes near Hormigueros Municipio
Rincón Municipio, PR 30 km (18 mi) SSW of here earthquakes near Rincón Municipio
Añasco Municipio, PR 33 km (20 mi) SW of here earthquakes near Añasco Municipio
San Germán Municipio, PR 34 km (21 mi) W of here earthquakes near San Germán Municipio
Lajas Municipio, PR 36 km (23 mi) WNW of here earthquakes near Lajas Municipio

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

Aftershocks so far

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

  1. 2.1 Mona Passage
  2. 3.0 31 km W of Puerto Real, Puerto Rico
  3. 2.2 14 km WNW of Puerto Real, Puerto Rico
  4. 2.4 1 km ENE of Mayagüez, Puerto Rico
  5. 2.1 17 km SW of Stella, Puerto Rico
  6. 2.6 7 km WNW of Rincón, Puerto Rico
  7. 1.5 6 km SSE of Pole Ojea, Puerto Rico
  8. 2.3 22 km SW of Stella, Puerto Rico
  9. 1.8 3 km SSW of Cabo Rojo, Puerto Rico
  10. 2.5 40 km W of Rincón, Puerto Rico
  11. 1.9 24 km SW of Stella, Puerto Rico
  12. 1.9 13 km WNW of Puerto Real, Puerto Rico
  13. 2.6 0 km NNE of Lajas, Puerto Rico
  14. 2.0 10 km NW of Puerto Real, Puerto Rico
  15. 1.9 Puerto Rico region

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.