QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8md

8 km SSW of Guánica, Puerto Rico

· 6.0 km deep · released about 16 lb of TNT

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10 km30 km60 km120 km N Guánica Municipio 6 kmLajas Municipio 15 kmGuayanilla Municipio 18 kmSabana Grande Municipio 21 kmYauco Municipio 22 kmPeñuelas Municipio 26 kmSan Germán Municipio 26 kmCabo Rojo Municipio 29 kmMaricao Municipio 31 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
6.0 km below the surface
Felt
no reports yet
Nearest
Guánica Municipio, 6 km N
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2815 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 16 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 5.8 970,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 680,000× the energy of this one
  3. Around the size people start to feel M 3.0 61× the energy of this one
  4. This earthquake M 1.8 about 16 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 17.8981, -66.9305. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Guánica Municipio, PR 6 km (3 mi) S of here earthquakes near Guánica Municipio
Lajas Municipio, PR 15 km (9 mi) SE of here earthquakes near Lajas Municipio
Guayanilla Municipio, PR 18 km (11 mi) SW of here earthquakes near Guayanilla Municipio
Sabana Grande Municipio, PR 21 km (13 mi) S of here earthquakes near Sabana Grande Municipio
Yauco Municipio, PR 22 km (14 mi) SSW of here earthquakes near Yauco Municipio
Peñuelas Municipio, PR 26 km (16 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

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

  1. 1.7 4 km E of Espino, Puerto Rico
  2. 2.3 6 km WSW of Las Marías, Puerto Rico
  3. 1.5 5 km NE of La Parguera, Puerto Rico
  4. 1.8 5 km NNE of Lluveras, Puerto Rico
  5. 2.4 7 km NE of Sabana Grande, Puerto Rico
  6. 1.9 0 km WNW of Fuig, Puerto Rico
  7. 1.6 2 km SE of Lajas, Puerto Rico
  8. 1.6 3 km WSW of Guánica, Puerto Rico
  9. 1.9 1 km W of Fuig, Puerto Rico
  10. 1.6 2 km ESE of La Parguera, Puerto Rico
  11. 1.9 4 km NNE of Sabana Eneas, Puerto Rico
  12. 1.6 20 km SSE of Tallaboa, Puerto Rico
  13. 2.8 19 km W of Puerto Real, Puerto Rico
  14. 2.5 1 km NW of Lajas, Puerto Rico
  15. 2.0 2 km WSW of Tallaboa, 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.