QuakeIndex

Earthquake · reviewed by a seismologist

M 1.9md

5 km NW of Adjuntas, Puerto Rico

· 14 km deep · released about 25 lb of TNT

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10 km30 km60 km120 km N Adjuntas Municipio 2 kmUtuado Municipio 11 kmLares Municipio 14 kmYauco Municipio 16 kmMaricao Municipio 18 kmJayuya Municipio 19 kmPeñuelas Municipio 19 kmGuayanilla Municipio 22 kmLas Marías Municipio 23 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 1.9 (md)
Depth
14 km below the surface
Felt
no reports yet
Nearest
Adjuntas Municipio, 2 km SSE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2904 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 25 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.0 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 600,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 420,000× the energy of this one
  3. Around the size people start to feel M 3.0 38× the energy of this one
  4. This earthquake M 1.9 about 25 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 18.1961, -66.7640. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Adjuntas Municipio, PR 2 km (1 mi) NNW of here earthquakes near Adjuntas Municipio
Utuado Municipio, PR 11 km (7 mi) SW of here earthquakes near Utuado Municipio
Lares Municipio, PR 14 km (9 mi) SE of here earthquakes near Lares Municipio
Yauco Municipio, PR 16 km (10 mi) NE of here earthquakes near Yauco Municipio
Maricao Municipio, PR 18 km (11 mi) E of here earthquakes near Maricao Municipio
Jayuya Municipio, PR 19 km (12 mi) W of here earthquakes near Jayuya Municipio

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

Aftershocks so far

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

  1. 2.1 2 km SSW of Mayagüez, Puerto Rico
  2. 2.4 9 km NNW of Puerto Real, Puerto Rico
  3. 2.2 6 km WSW of Mayagüez, Puerto Rico
  4. 2.0 2 km SW of Mayagüez, Puerto Rico
  5. 2.1 4 km WSW of Mayagüez, Puerto Rico
  6. 1.7 5 km NNW of Puerto Real, Puerto Rico
  7. 1.7 5 km W of Hormigueros, Puerto Rico
  8. 2.1 6 km NNW of Puerto Real, Puerto Rico
  9. 1.7 5 km NW of Puerto Real, Puerto Rico
  10. 1.7 1 km NNE of Sabana Grande, Puerto Rico
  11. 1.9 4 km N of Puerto Real, Puerto Rico
  12. 1.8 4 km W of Palmarejo, Puerto Rico
  13. 2.2 8 km NNW of Puerto Real, Puerto Rico
  14. 2.0 7 km NW of Puerto Real, Puerto Rico
  15. 1.9 4 km N 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

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.