QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8md

11 km W of Adjuntas, Puerto Rico

· 23 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 12 kmSabana Grande Municipio 15 kmLares Municipio 15 kmGuayanilla Municipio 16 kmPeñuelas Municipio 17 kmLas Marías Municipio 18 kmUtuado 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
23 km below the surface
Felt
no reports yet
Nearest
Yauco Municipio, 8 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2832 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 5.7 730,000× the energy of this one
  3. Around the size people start to feel M 3.0 65× 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 18.1496, -66.8283. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Yauco Municipio, PR 8 km (5 mi) NNE of here earthquakes near Yauco Municipio
Adjuntas Municipio, PR 8 km (5 mi) WSW of here earthquakes near Adjuntas Municipio
Maricao Municipio, PR 12 km (7 mi) ESE of here earthquakes near Maricao Municipio
Sabana Grande Municipio, PR 15 km (9 mi) ENE of here earthquakes near Sabana Grande Municipio
Lares Municipio, PR 15 km (9 mi) SSE of here earthquakes near Lares Municipio
Guayanilla Municipio, PR 16 km (10 mi) N of here earthquakes near Guayanilla Municipio

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

Aftershocks so far

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

  1. 1.8 8 km SSW of Guánica, Puerto Rico
  2. 1.8 Puerto Rico region
  3. 2.1 2 km NNE of Mayagüez, Puerto Rico
  4. 1.8 1 km SE of Piedra Gorda, Puerto Rico
  5. 1.9 0 km SW of Boquerón, Puerto Rico
  6. 1.8 6 km NE of La Parguera, Puerto Rico
  7. 1.7 4 km SW of Liborio Negron Torres, Puerto Rico
  8. 1.7 21 km S of La Parguera, Puerto Rico
  9. 2.1 13 km SSW of Guánica, Puerto Rico
  10. 2.0 7 km S of Tallaboa, Puerto Rico
  11. 2.4 9 km SW of La Playa, Puerto Rico
  12. 1.6 1 km SSE of Capitanejo, Puerto Rico
  13. 1.6 0 km N of San Germán, Puerto Rico
  14. 1.7 1 km W of Puerto Real, Puerto Rico
  15. 1.8 17 km SSE of Indios, 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.