QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8Md

1 km SSE of Guánica, Puerto Rico

· 10 km deep · released about 15 lb of TNT

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10 km30 km60 km120 km N Guánica Municipio 2 kmGuayanilla Municipio 12 kmLajas Municipio 15 kmSabana Grande Municipio 15 kmYauco Municipio 15 kmPeñuelas Municipio 20 kmSan Germán Municipio 22 kmMaricao Municipio 24 kmAdjuntas Municipio 29 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 1.8 (Md)
Depth
10 km below the surface
Felt
no reports yet
Nearest
Guánica Municipio, 2 km WSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3487 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 15 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,000,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 710,000× the energy of this one
  3. Around the size people start to feel M 3.0 63× the energy of this one
  4. This earthquake M 1.8 about 15 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 17.9570, -66.9030. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Guánica Municipio, PR 2 km (1 mi) ENE of here earthquakes near Guánica Municipio
Guayanilla Municipio, PR 12 km (8 mi) WSW of here earthquakes near Guayanilla Municipio
Lajas Municipio, PR 15 km (9 mi) E of here earthquakes near Lajas Municipio
Sabana Grande Municipio, PR 15 km (9 mi) SSE of here earthquakes near Sabana Grande Municipio
Yauco Municipio, PR 15 km (9 mi) SSW of here earthquakes near Yauco Municipio
Peñuelas Municipio, PR 20 km (12 mi) WSW of here earthquakes near Peñuelas Municipio

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

Aftershocks so far

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

  1. 2.1 2 km SE of Sabana Eneas, Puerto Rico
  2. 1.7 3 km SSE of Boquerón, Puerto Rico
  3. 1.9 0 km NNE of Ponce, Puerto Rico
  4. 1.7 11 km W of Puerto Real, Puerto Rico
  5. 2.0 5 km SW of Adjuntas, Puerto Rico
  6. 2.5 5 km SSE of Espino, Puerto Rico
  7. 1.8 12 km S of Pole Ojea, Puerto Rico
  8. 1.9 8 km S of La Parguera, Puerto Rico
  9. 2.4 16 km WNW of Puerto Real, Puerto Rico
  10. 2.3 9 km S of Pole Ojea, Puerto Rico
  11. 2.1 14 km SSW of Guánica, Puerto Rico
  12. 2.0 9 km SW of Guánica, Puerto Rico
  13. 2.1 10 km SW of Guánica, Puerto Rico
  14. 2.0 5 km W of La Parguera, Puerto Rico
  15. 1.9 16 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.