QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8md

32 km SSW of Guánica, Puerto Rico

· 8.0 km deep · released about 15 lb of TNT

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10 km30 km60 km120 km N Guánica Municipio 30 kmLajas Municipio 33 kmGuayanilla Municipio 40 kmCabo Rojo Municipio 41 kmSabana Grande Municipio 44 kmYauco Municipio 46 kmPeñuelas Municipio 46 kmSan Germán Municipio 47 kmHormigueros Municipio 52 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
8.0 km below the surface
Felt
no reports yet
Nearest
Guánica Municipio, 30 km NNE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2673 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 5.7 730,000× the energy of this one
  3. Around the size people start to feel M 3.0 65× 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 17.6866, -66.9798. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Guánica Municipio, PR 30 km (18 mi) SSW of here earthquakes near Guánica Municipio
Lajas Municipio, PR 33 km (21 mi) S of here earthquakes near Lajas Municipio
Guayanilla Municipio, PR 40 km (25 mi) SSW of here earthquakes near Guayanilla Municipio
Cabo Rojo Municipio, PR 41 km (25 mi) SSE of here earthquakes near Cabo Rojo Municipio
Sabana Grande Municipio, PR 44 km (28 mi) S of here earthquakes near Sabana Grande Municipio
Yauco Municipio, PR 46 km (29 mi) SSW of here earthquakes near Yauco 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. 1.9 Mona Passage
  2. 1.9 0 km NW of Fuig, Puerto Rico
  3. 1.9 16 km SSW of Guánica, Puerto Rico
  4. 2.2 10 km S of Pole Ojea, Puerto Rico
  5. 2.0 11 km S of Pole Ojea, Puerto Rico
  6. 1.9 8 km S of Pole Ojea, Puerto Rico
  7. 1.8 6 km NNE of Sabana Grande, Puerto Rico
  8. 1.7 4 km SSW of Liborio Negron Torres, Puerto Rico
  9. 1.8 1 km S of La Parguera, Puerto Rico
  10. 1.7 2 km SSW of La Parguera, Puerto Rico
  11. 1.8 3 km SSE of La Parguera, Puerto Rico
  12. 1.5 2 km NW of Sabana Grande, Puerto Rico
  13. 1.8 2 km N of Sabana Grande, Puerto Rico
  14. 1.5 1 km NNE of Sabana Grande, 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.