QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8md

6 km SW of Utuado, Puerto Rico

· 33 km deep · released about 14 lb of TNT

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10 km30 km60 km120 km N Adjuntas Municipio 5 kmUtuado Municipio 7 kmLares Municipio 15 kmJayuya Municipio 16 kmYauco Municipio 20 kmMaricao Municipio 21 kmPeñuelas Municipio 22 kmArecibo Municipio 25 kmGuayanilla Municipio 25 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
33 km below the surface
Felt
no reports yet
Nearest
Adjuntas Municipio, 5 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2833 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 5.7 790,000× the energy of this one
  3. Around the size people start to feel M 3.0 70× 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 18.2211, -66.7395. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Adjuntas Municipio, PR 5 km (3 mi) NNE of here earthquakes near Adjuntas Municipio
Utuado Municipio, PR 7 km (4 mi) SW of here earthquakes near Utuado Municipio
Lares Municipio, PR 15 km (9 mi) ESE of here earthquakes near Lares Municipio
Jayuya Municipio, PR 16 km (10 mi) W of here earthquakes near Jayuya Municipio
Yauco Municipio, PR 20 km (12 mi) NE of here earthquakes near Yauco Municipio
Maricao Municipio, PR 21 km (13 mi) ENE of here earthquakes near Maricao Municipio

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

Aftershocks so far

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

  1. 1.6 1 km SSE of Capitanejo, Puerto Rico
  2. 1.6 0 km N of San Germán, Puerto Rico
  3. 1.8 17 km SSE of Indios, Puerto Rico
  4. 1.6 5 km W of Jayuya, Puerto Rico
  5. 2.0 6 km S of Tallaboa, Puerto Rico
  6. 1.8 7 km SW of Guánica, Puerto Rico
  7. 1.6 10 km S of Guánica, Puerto Rico
  8. 2.0 3 km SW of Sabana Grande, Puerto Rico
  9. 1.9 1 km W of Las Ollas, Puerto Rico
  10. 1.8 13 km SSW of Guánica, Puerto Rico
  11. 1.9 7 km WSW of Adjuntas, Puerto Rico
  12. 2.2 5 km WSW of Liborio Negron Torres, Puerto Rico
  13. 2.1 13 km SSW of Guánica, Puerto Rico
  14. 1.7 5 km N of Yauco, Puerto Rico
  15. 1.8 4 km SW of Tallaboa, 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.