QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8md

4 km SSE of Maricao, Puerto Rico

· 22 km deep · released about 13 lb of TNT

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10 km30 km60 km120 km N Maricao Municipio 4 kmSabana Grande Municipio 7 kmSan Germán Municipio 9 kmLas Marías Municipio 10 kmYauco Municipio 12 kmHormigueros Municipio 17 kmLares Municipio 17 kmLajas Municipio 20 kmSan Sebastián Municipio 21 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
22 km below the surface
Felt
no reports yet
Nearest
Maricao Municipio, 4 km NNE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3320 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 13 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 5.7 810,000× the energy of this one
  3. Around the size people start to feel M 3.0 72× the energy of this one
  4. This earthquake M 1.8 about 13 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 18.1425, -66.9556. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Maricao Municipio, PR 4 km (3 mi) SSW of here earthquakes near Maricao Municipio
Sabana Grande Municipio, PR 7 km (4 mi) N of here earthquakes near Sabana Grande Municipio
San Germán Municipio, PR 9 km (6 mi) ENE of here earthquakes near San Germán Municipio
Las Marías Municipio, PR 10 km (6 mi) SSE of here earthquakes near Las Marías Municipio
Yauco Municipio, PR 12 km (8 mi) WNW of here earthquakes near Yauco Municipio
Hormigueros Municipio, PR 17 km (11 mi) E of here earthquakes near Hormigueros Municipio

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

Aftershocks so far

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

  1. 2.1 7 km SE of Maricao, Puerto Rico
  2. 1.7 10 km ESE of Maricao, Puerto Rico
  3. 1.8 3 km NW of Fuig, Puerto Rico
  4. 2.0 4 km W of Palmarejo, Puerto Rico
  5. 2.4 5 km WNW of Aguada, Puerto Rico
  6. 2.1 2 km SE of Palmarejo, Puerto Rico
  7. 2.3 12 km WNW of Adjuntas, Puerto Rico
  8. 2.2 10 km SW of La Playa, Puerto Rico
  9. 2.6 4 km ENE of La Parguera, Puerto Rico
  10. 1.9 4 km ESE of San Germán, Puerto Rico
  11. 2.5 6 km NNE of Hatillo, Puerto Rico
  12. 2.2 3 km NW of Guayabal, Puerto Rico
  13. 3.4 3 km NNE of Las Marias, Puerto Rico
  14. 3.3 1 km SW of San Sebastián, Puerto Rico
  15. 2.1 2 km W of Las Marías, 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.