QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8Md

8 km SSE of Maria Antonia, Puerto Rico

· 17 km deep · released about 15 lb of TNT

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10 km30 km60 km120 km N Guánica Municipio 7 kmGuayanilla Municipio 14 kmLajas Municipio 20 kmPeñuelas Municipio 20 kmYauco Municipio 20 kmSabana Grande Municipio 22 kmSan Germán Municipio 29 kmPonce Municipio 30 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
17 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 3634 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 15 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 1,000,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 710,000× the energy of this one
  3. Around the size people start to feel M 3.0 63× the energy of this one
  4. This earthquake M 1.8 about 15 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 17.9044, -66.8693. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Guánica Municipio, PR 7 km (5 mi) SE of here earthquakes near Guánica Municipio
Guayanilla Municipio, PR 14 km (8 mi) SW of here earthquakes near Guayanilla Municipio
Lajas Municipio, PR 20 km (12 mi) ESE of here earthquakes near Lajas Municipio
Peñuelas Municipio, PR 20 km (13 mi) SW of here earthquakes near Peñuelas Municipio
Yauco Municipio, PR 20 km (13 mi) S of here earthquakes near Yauco Municipio
Sabana Grande Municipio, PR 22 km (13 mi) SSE of here earthquakes near Sabana Grande Municipio

Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.

Aftershocks so far

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

  1. 2.0 6 km SSW of Tallaboa, Puerto Rico
  2. 2.2 3 km NW of Hormigueros, Puerto Rico
  3. 2.4 13 km SSW of Guánica, Puerto Rico
  4. 1.6 3 km W of Liborio Negron Torres, Puerto Rico
  5. 2.2 Mona Passage
  6. 1.7 6 km ENE of Hormigueros, Puerto Rico
  7. 2.1 9 km SE of Pole Ojea, Puerto Rico
  8. 2.1 5 km WSW of La Parguera, Puerto Rico
  9. 2.6 17 km S of Tallaboa, Puerto Rico
  10. 2.1 1 km SSE of Ponce, Puerto Rico
  11. 2.8 1 km S of Ponce, Puerto Rico
  12. 2.7 1 km SSE of Ponce, Puerto Rico
  13. 1.8 7 km NNE of Sabana Grande, Puerto Rico
  14. 1.5 8 km SW of La Parguera, Puerto Rico
  15. 1.8 9 km SW of La Parguera, 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.