QuakeIndex

Earthquake · reviewed by a seismologist

M 1.9md

1 km W of Las Ollas, Puerto Rico

· 17 km deep · released about 21 lb of TNT

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10 km30 km60 km120 km N Juana Díaz Municipio 6 kmSanta Isabel Municipio 10 kmVillalba Municipio 11 kmCoamo Municipio 12 kmPonce Municipio 18 kmSalinas Municipio 20 kmOrocovis Municipio 21 kmAibonito Municipio 22 kmBarranquitas 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
17 km below the surface
Felt
no reports yet
Nearest
Juana Díaz Municipio, 6 km SW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2823 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 21 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 710,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 500,000× the energy of this one
  3. Around the size people start to feel M 3.0 45× the energy of this one
  4. This earthquake M 1.9 about 21 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 18.0315, -66.4423. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Juana Díaz Municipio, PR 6 km (4 mi) NE of here earthquakes near Juana Díaz Municipio
Santa Isabel Municipio, PR 10 km (7 mi) NNW of here earthquakes near Santa Isabel Municipio
Villalba Municipio, PR 11 km (7 mi) SSE of here earthquakes near Villalba Municipio
Coamo Municipio, PR 12 km (7 mi) SW of here earthquakes near Coamo Municipio
Ponce Municipio, PR 18 km (11 mi) E of here earthquakes near Ponce Municipio
Salinas Municipio, PR 20 km (13 mi) WNW of here earthquakes near Salinas Municipio

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

Aftershocks so far

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

  1. 1.6 20 km SSE of Tallaboa, Puerto Rico
  2. 2.5 1 km ESE of Salinas, Puerto Rico
  3. 2.0 2 km WSW of Tallaboa, Puerto Rico
  4. 1.9 2 km WNW of Las Ollas, Puerto Rico
  5. 1.8 8 km SSW of Ciales, Puerto Rico
  6. 2.0 11 km SSE of Guánica, Puerto Rico
  7. 2.0 8 km WSW of Adjuntas, Puerto Rico
  8. 1.9 14 km SSE of Indios, Puerto Rico
  9. 1.7 3 km SW of Tallaboa, Puerto Rico
  10. 1.6 7 km NNE of Tallaboa Alta, Puerto Rico
  11. 1.7 5 km ENE of Adjuntas, Puerto Rico
  12. 1.6 8 km SSE of Maria Antonia, Puerto Rico
  13. 2.5 12 km E of Maricao, Puerto Rico
  14. 2.2 1 km NW of Sumidero, Puerto Rico
  15. 2.0 6 km NW of Adjuntas, 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.