QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1md

1 km N of Fuig, Puerto Rico

· 9.0 km deep · released about 49 lb of TNT

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10 km30 km60 km120 km N Guánica Municipio 6 kmSabana Grande Municipio 10 kmYauco Municipio 11 kmGuayanilla Municipio 12 kmLajas Municipio 14 kmSan Germán Municipio 17 kmMaricao Municipio 19 kmPeñuelas Municipio 20 kmAdjuntas Municipio 26 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
9.0 km below the surface
Felt
no reports yet
Nearest
Guánica Municipio, 6 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2912 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 49 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 5.8 310,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 220,000× the energy of this one
  3. Around the size people start to feel M 3.0 19× the energy of this one
  4. This earthquake M 2.1 about 49 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 18.0045, -66.9130. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Guánica Municipio, PR 6 km (4 mi) N of here earthquakes near Guánica Municipio
Sabana Grande Municipio, PR 10 km (6 mi) SSE of here earthquakes near Sabana Grande Municipio
Yauco Municipio, PR 11 km (7 mi) SSW of here earthquakes near Yauco Municipio
Guayanilla Municipio, PR 12 km (8 mi) W of here earthquakes near Guayanilla Municipio
Lajas Municipio, PR 14 km (9 mi) ENE of here earthquakes near Lajas Municipio
San Germán Municipio, PR 17 km (11 mi) SE 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

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

  1. 1.9 11 km W of Mayagüez, Puerto Rico
  2. 1.7 1 km NNE of Sabana Grande, Puerto Rico
  3. 2.0 8 km WNW of Puerto Real, Puerto Rico
  4. 1.9 4 km N of Puerto Real, Puerto Rico
  5. 2.3 7 km WNW of Puerto Real, Puerto Rico
  6. 1.8 4 km W of Palmarejo, Puerto Rico
  7. 2.4 8 km NW of Puerto Real, Puerto Rico
  8. 1.9 7 km NW of Puerto Real, Puerto Rico
  9. 1.7 9 km NW of Puerto Real, Puerto Rico
  10. 1.7 7 km NW of Puerto Real, Puerto Rico
  11. 2.2 8 km NNW of Puerto Real, Puerto Rico
  12. 2.0 7 km NW of Puerto Real, Puerto Rico
  13. 1.9 4 km N of Puerto Real, Puerto Rico
  14. 2.4 9 km NW of Puerto Real, Puerto Rico
  15. 2.1 7 km NW of Puerto Real, 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.