QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8md

19 km S of Guánica, Puerto Rico

· 8.0 km deep · released about 17 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Guánica Municipio 17 kmLajas Municipio 24 kmGuayanilla Municipio 27 kmSabana Grande Municipio 32 kmYauco Municipio 33 kmPeñuelas Municipio 33 kmCabo Rojo Municipio 35 kmSan Germán Municipio 37 kmPonce Municipio 41 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, 17 km N
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3445 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 17 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 5.8 900,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 640,000× the energy of this one
  3. Around the size people start to feel M 3.0 57× the energy of this one
  4. This earthquake M 1.8 about 17 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 17.7956, -66.9255. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Guánica Municipio, PR 17 km (11 mi) S of here earthquakes near Guánica Municipio
Lajas Municipio, PR 24 km (15 mi) SSE of here earthquakes near Lajas Municipio
Guayanilla Municipio, PR 27 km (17 mi) SSW of here earthquakes near Guayanilla Municipio
Sabana Grande Municipio, PR 32 km (20 mi) S of here earthquakes near Sabana Grande Municipio
Yauco Municipio, PR 33 km (21 mi) SSW of here earthquakes near Yauco Municipio
Peñuelas Municipio, PR 33 km (21 mi) SW of here earthquakes near Peñuelas 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. 2.1 10 km ESE of Maricao, Puerto Rico
  2. 1.8 3 km NNE of Monte Grande, Puerto Rico
  3. 2.1 8 km WSW of Guánica, Puerto Rico
  4. 1.9 Mona Passage
  5. 2.5 9 km SW of Guánica, Puerto Rico
  6. 2.4 13 km SSW of Guánica, Puerto Rico
  7. 2.3 7 km NNW of Puerto Real, Puerto Rico
  8. 1.6 2 km SW of Palmarejo, Puerto Rico
  9. 2.1 Puerto Rico region
  10. 1.6 19 km S of Pole Ojea, Puerto Rico
  11. 2.1 2 km S of Guayanilla, Puerto Rico
  12. 1.8 5 km ENE of Hormigueros, Puerto Rico
  13. 1.8 Mona Passage
  14. 2.2 2 km NNW of Sabana Eneas, Puerto Rico
  15. 2.2 6 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.