QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8md

13 km SSW of Guánica, Puerto Rico

· 13 km deep · released about 16 lb of TNT

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10 km30 km60 km120 km N Guánica Municipio 10 kmLajas Municipio 14 kmGuayanilla Municipio 24 kmSabana Grande Municipio 24 kmCabo Rojo Municipio 27 kmYauco Municipio 27 kmSan Germán Municipio 28 kmPeñuelas Municipio 31 kmHormigueros Municipio 33 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, 10 km NNE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2823 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 5.8 930,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 660,000× the energy of this one
  3. Around the size people start to feel M 3.0 59× 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 17.8685, -66.9680. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Guánica Municipio, PR 10 km (6 mi) SSW of here earthquakes near Guánica Municipio
Lajas Municipio, PR 14 km (9 mi) SSE of here earthquakes near Lajas Municipio
Guayanilla Municipio, PR 24 km (15 mi) SW of here earthquakes near Guayanilla Municipio
Sabana Grande Municipio, PR 24 km (15 mi) S of here earthquakes near Sabana Grande Municipio
Cabo Rojo Municipio, PR 27 km (17 mi) ESE of here earthquakes near Cabo Rojo Municipio
Yauco Municipio, PR 27 km (17 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

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

  1. 2.0 11 km SSE of Guánica, Puerto Rico
  2. 1.8 13 km SSW of Guánica, Puerto Rico
  3. 2.0 8 km WSW of Adjuntas, Puerto Rico
  4. 1.9 14 km SSE of Indios, Puerto Rico
  5. 1.7 3 km SW of Tallaboa, Puerto Rico
  6. 1.6 7 km NNE of Tallaboa Alta, Puerto Rico
  7. 1.6 9 km SW of La Parguera, Puerto Rico
  8. 1.6 6 km ESE of Pole Ojea, Puerto Rico
  9. 2.3 6 km N of Puerto Real, Puerto Rico
  10. 1.7 5 km ENE of Adjuntas, Puerto Rico
  11. 2.2 3 km ESE of Espino, Puerto Rico
  12. 1.6 11 km SW of Pole Ojea, Puerto Rico
  13. 2.1 6 km SW of Maricao, Puerto Rico
  14. 1.9 7 km SSW of Guánica, Puerto Rico
  15. 1.6 8 km SSE of Maria Antonia, 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.