QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8md

14 km S of Guánica, Puerto Rico

· 13 km deep · released about 13 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Guánica Municipio 12 kmLajas Municipio 20 kmGuayanilla Municipio 23 kmSabana Grande Municipio 27 kmYauco Municipio 28 kmPeñuelas Municipio 30 kmCabo Rojo Municipio 32 kmSan Germán Municipio 32 kmMaricao Municipio 37 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
13 km below the surface
Felt
no reports yet
Nearest
Guánica Municipio, 12 km N
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2981 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 13 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 1,100,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 810,000× the energy of this one
  3. Around the size people start to feel M 3.0 72× the energy of this one
  4. This earthquake M 1.8 about 13 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 17.8380, -66.9271. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Guánica Municipio, PR 12 km (8 mi) S of here earthquakes near Guánica Municipio
Lajas Municipio, PR 20 km (12 mi) SE of here earthquakes near Lajas Municipio
Guayanilla Municipio, PR 23 km (14 mi) SW of here earthquakes near Guayanilla Municipio
Sabana Grande Municipio, PR 27 km (17 mi) S of here earthquakes near Sabana Grande Municipio
Yauco Municipio, PR 28 km (18 mi) SSW of here earthquakes near Yauco Municipio
Peñuelas Municipio, PR 30 km (18 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

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

  1. 1.9 5 km SW of Playita Cortada, Puerto Rico
  2. 1.8 6 km SW of Liborio Negron Torres, Puerto Rico
  3. 1.8 8 km SSE of Guánica, Puerto Rico
  4. 1.6 8 km S of La Parguera, Puerto Rico
  5. 1.7 3 km W of Sabana Grande, Puerto Rico
  6. 2.5 14 km SSW of Guánica, Puerto Rico
  7. 2.4 14 km SSW of Guánica, Puerto Rico
  8. 2.5 5 km N of Puerto Real, Puerto Rico
  9. 1.8 2 km SE of Puerto Real, Puerto Rico
  10. 1.9 0 km SSW of Boquerón, Puerto Rico
  11. 2.0 4 km WSW of Ponce, Puerto Rico
  12. 1.7 2 km NNE of Santo Domingo, Puerto Rico
  13. 1.6 11 km S of Pole Ojea, Puerto Rico
  14. 2.3 1 km W of Hormigueros, Puerto Rico
  15. 1.6 4 km SSW of Adjuntas, 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.