QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8md

10 km WSW of Adjuntas, Puerto Rico

· 22 km deep · released about 15 lb of TNT

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10 km30 km60 km120 km N Yauco Municipio 8 kmAdjuntas Municipio 8 kmMaricao Municipio 13 kmSabana Grande Municipio 15 kmGuayanilla Municipio 15 kmPeñuelas Municipio 16 kmLares Municipio 16 kmUtuado Municipio 19 kmLas Marías Municipio 19 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
Yauco Municipio, 8 km SW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2772 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 18.1416, -66.8176. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Yauco Municipio, PR 8 km (5 mi) NE of here earthquakes near Yauco Municipio
Adjuntas Municipio, PR 8 km (5 mi) SW of here earthquakes near Adjuntas Municipio
Maricao Municipio, PR 13 km (8 mi) ESE of here earthquakes near Maricao Municipio
Sabana Grande Municipio, PR 15 km (9 mi) ENE of here earthquakes near Sabana Grande Municipio
Guayanilla Municipio, PR 15 km (9 mi) N of here earthquakes near Guayanilla Municipio
Peñuelas Municipio, PR 16 km (10 mi) NW of here earthquakes near Peñuelas Municipio

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

Aftershocks so far

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

  1. 2.2 Puerto Rico region
  2. 1.9 2 km SSW of Ponce, Puerto Rico
  3. 1.6 9 km SSW of Tallaboa, Puerto Rico
  4. 2.0 4 km SSW of La Playa, Puerto Rico
  5. 2.1 6 km NW of Santo Domingo, Puerto Rico
  6. 2.0 6 km W of Boquerón, Puerto Rico
  7. 1.8 2 km NW of Indios, Puerto Rico
  8. 1.5 1 km NNW of Yauco, Puerto Rico
  9. 1.7 3 km S of Maricao, Puerto Rico
  10. 1.8 3 km W of La Playa, Puerto Rico
  11. 2.2 7 km WSW of Maricao, Puerto Rico
  12. 2.5 2 km S of Las Marías, Puerto Rico
  13. 1.9 10 km SSE of Tallaboa, Puerto Rico
  14. 1.9 1 km S of Lajas, Puerto Rico
  15. 2.4 7 km NNW of Puerto Real, 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

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