QuakeIndex

Earthquake · reviewed by a seismologist

M 1.7md

4 km SSW of Liborio Negron Torres, Puerto Rico

· 9.0 km deep · released about 10 lb of TNT

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10 km30 km60 km120 km N Guánica Municipio 7 kmLajas Municipio 9 kmSabana Grande Municipio 9 kmSan Germán Municipio 14 kmYauco Municipio 14 kmGuayanilla Municipio 17 kmMaricao Municipio 19 kmHormigueros Municipio 22 kmCabo Rojo 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 1.7 (md)
Depth
9.0 km below the surface
Felt
no reports yet
Nearest
Guánica Municipio, 7 km SSE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2651 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 10 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.7 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,500,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,100,000× the energy of this one
  3. Around the size people start to feel M 3.0 95× the energy of this one
  4. This earthquake M 1.7 about 10 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 18.0050, -66.9610. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Guánica Municipio, PR 7 km (5 mi) NNW of here earthquakes near Guánica Municipio
Lajas Municipio, PR 9 km (6 mi) ENE of here earthquakes near Lajas Municipio
Sabana Grande Municipio, PR 9 km (6 mi) S of here earthquakes near Sabana Grande Municipio
San Germán Municipio, PR 14 km (9 mi) SE of here earthquakes near San Germán Municipio
Yauco Municipio, PR 14 km (9 mi) SW of here earthquakes near Yauco Municipio
Guayanilla Municipio, PR 17 km (11 mi) W of here earthquakes near Guayanilla Municipio

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

Aftershocks so far

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

  1. 1.9 4 km S of Tallaboa, Puerto Rico
  2. 1.7 4 km WSW of Liborio Negron Torres, Puerto Rico
  3. 1.8 1 km ESE of Stella, Puerto Rico
  4. 2.0 6 km NNE of Sabana Eneas, Puerto Rico
  5. 2.3 3 km ENE of Espino, Puerto Rico
  6. 1.9 8 km N of Yauco, Puerto Rico
  7. 1.5 22 km W of Pole Ojea, Puerto Rico
  8. 1.7 4 km WSW of Ponce, Puerto Rico
  9. 2.1 2 km E of Mayagüez, Puerto Rico
  10. 1.7 5 km NNE of Sabana Grande, Puerto Rico
  11. 1.8 4 km SSW of Añasco, Puerto Rico
  12. 1.9 6 km NW of Adjuntas, Puerto Rico
  13. 1.6 5 km NNE of Sabana Grande, Puerto Rico
  14. 2.4 5 km NNE of Sabana Grande, Puerto Rico
  15. 1.6 7 km ESE of Las Marías, 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.