QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8md

8 km SSE of Guánica, Puerto Rico

· 8.0 km deep · released about 14 lb of TNT

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10 km30 km60 km120 km N Guánica Municipio 7 kmGuayanilla Municipio 15 kmLajas Municipio 18 kmYauco Municipio 21 kmSabana Grande Municipio 21 kmPeñuelas Municipio 22 kmSan Germán Municipio 28 kmMaricao Municipio 31 kmPonce 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
8.0 km below the surface
Felt
no reports yet
Nearest
Guánica Municipio, 7 km NW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2954 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 14 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 5.7 790,000× the energy of this one
  3. Around the size people start to feel M 3.0 70× the energy of this one
  4. This earthquake M 1.8 about 14 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 17.9018, -66.8850. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Guánica Municipio, PR 7 km (4 mi) SE of here earthquakes near Guánica Municipio
Guayanilla Municipio, PR 15 km (9 mi) SW of here earthquakes near Guayanilla Municipio
Lajas Municipio, PR 18 km (11 mi) ESE of here earthquakes near Lajas Municipio
Yauco Municipio, PR 21 km (13 mi) S of here earthquakes near Yauco Municipio
Sabana Grande Municipio, PR 21 km (13 mi) SSE of here earthquakes near Sabana Grande Municipio
Peñuelas Municipio, PR 22 km (13 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 6 km NW of Puerto Real, Puerto Rico
  2. 1.7 13 km WNW of Pole Ojea, Puerto Rico
  3. 1.7 8 km WSW of Puerto Real, Puerto Rico
  4. 2.1 9 km NW of Puerto Real, Puerto Rico
  5. 1.9 10 km WNW of Puerto Real, Puerto Rico
  6. 2.1 7 km WSW of Mayagüez, Puerto Rico
  7. 2.7 10 km NNW of Puerto Real, Puerto Rico
  8. 1.9 7 km E of Pole Ojea, Puerto Rico
  9. 2.4 9 km NW of Puerto Real, Puerto Rico
  10. 2.2 9 km WNW of Pole Ojea, Puerto Rico
  11. 1.7 5 km SW of Adjuntas, Puerto Rico
  12. 1.9 6 km SE of Maricao, Puerto Rico
  13. 2.1 4 km NNW of Mayagüez, Puerto Rico
  14. 2.0 21 km S of Indios, Puerto Rico
  15. 1.9 0 km SW of Santo Domingo, 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.