QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8md

8 km ENE of Maricao, Puerto Rico

· 20 km deep · released about 14 lb of TNT

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10 km30 km60 km120 km N Maricao Municipio 5 kmLas Marías Municipio 8 kmLares Municipio 8 kmYauco Municipio 14 kmSabana Grande Municipio 14 kmSan Sebastián Municipio 15 kmAdjuntas Municipio 16 kmSan Germán Municipio 18 kmUtuado Municipio 22 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
20 km below the surface
Felt
no reports yet
Nearest
Maricao Municipio, 5 km SW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2560 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 5.7 760,000× the energy of this one
  3. Around the size people start to feel M 3.0 68× 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 18.2076, -66.9025. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Maricao Municipio, PR 5 km (3 mi) NE of here earthquakes near Maricao Municipio
Las Marías Municipio, PR 8 km (5 mi) ESE of here earthquakes near Las Marías Municipio
Lares Municipio, PR 8 km (5 mi) SSW of here earthquakes near Lares Municipio
Yauco Municipio, PR 14 km (9 mi) NNW of here earthquakes near Yauco Municipio
Sabana Grande Municipio, PR 14 km (9 mi) NNE of here earthquakes near Sabana Grande Municipio
San Sebastián Municipio, PR 15 km (10 mi) SSE of here earthquakes near San Sebastián Municipio

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

Aftershocks so far

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

  1. 2.0 12 km S of Ponce, Puerto Rico
  2. 2.3 7 km WSW of Guánica, Puerto Rico
  3. 2.2 13 km SSE of Ponce, Puerto Rico
  4. 2.0 12 km SSE of Ponce, Puerto Rico
  5. 1.6 3 km WSW of Fuig, Puerto Rico
  6. 2.0 20 km SSE of Indios, Puerto Rico
  7. 1.9 2 km SW of Adjuntas, Puerto Rico
  8. 2.0 14 km SW of Potala Pastillo, Puerto Rico
  9. 2.1 14 km SSE of Guánica, Puerto Rico
  10. 2.0 12 km SSE of Ponce, Puerto Rico
  11. 2.0 2 km NNE of Sabana Grande, Puerto Rico
  12. 1.8 4 km WNW of Hormigueros, Puerto Rico
  13. 2.0 12 km S of Ponce, Puerto Rico
  14. 2.6 4 km NNE of Isabela, Puerto Rico
  15. 1.6 6 km WSW of Guánica, 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.