QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1md

22 km SSE of Maria Antonia, Puerto Rico

· 31 km deep · released about 43 lb of TNT

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10 km30 km60 km120 km N Guánica Municipio 21 kmGuayanilla Municipio 24 kmPeñuelas Municipio 28 kmLajas Municipio 31 kmPonce Municipio 33 kmYauco Municipio 33 kmSabana Grande Municipio 35 kmSan Germán Municipio 42 kmJuana Díaz Municipio 42 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
31 km below the surface
Felt
no reports yet
Nearest
Guánica Municipio, 21 km NNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3069 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 43 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 5.8 350,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 250,000× the energy of this one
  3. Around the size people start to feel M 3.0 22× the energy of this one
  4. This earthquake M 2.1 about 43 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 17.7891, -66.8236. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Guánica Municipio, PR 21 km (13 mi) SSE of here earthquakes near Guánica Municipio
Guayanilla Municipio, PR 24 km (15 mi) S of here earthquakes near Guayanilla Municipio
Peñuelas Municipio, PR 28 km (18 mi) SSW of here earthquakes near Peñuelas Municipio
Lajas Municipio, PR 31 km (19 mi) SE of here earthquakes near Lajas Municipio
Ponce Municipio, PR 33 km (20 mi) SW of here earthquakes near Ponce Municipio
Yauco Municipio, PR 33 km (21 mi) S of here earthquakes near Yauco Municipio

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

Aftershocks so far

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

  1. 1.8 3 km WSW of Tallaboa, Puerto Rico
  2. 1.9 Puerto Rico region
  3. 1.6 3 km E of Tallaboa, Puerto Rico
  4. 1.6 4 km SW of Capitanejo, Puerto Rico
  5. 2.2 4 km WSW of Capitanejo, Puerto Rico
  6. 2.5 3 km SW of Capitanejo, Puerto Rico
  7. 2.0 20 km S of Guánica, Puerto Rico
  8. 2.1 5 km N of Sabana Eneas, Puerto Rico
  9. 1.7 1 km ESE of Guayabal, Puerto Rico
  10. 1.7 1 km NW of Lluveras, Puerto Rico
  11. 1.7 5 km WSW of Liborio Negron Torres, Puerto Rico
  12. 1.6 8 km SSW of Guánica, Puerto Rico
  13. 2.0 6 km ESE of Maricao, Puerto Rico
  14. 2.1 2 km NE of Lluveras, Puerto Rico
  15. 1.6 4 km WNW of Fuig, 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.