QuakeIndex

Earthquake · reviewed by a seismologist

M 1.7md

1 km SSW of Liborio Negron Torres, Puerto Rico

· 21 km deep · released about 10 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Sabana Grande Municipio 6 kmGuánica Municipio 10 kmYauco Municipio 11 kmLajas Municipio 12 kmSan Germán Municipio 13 kmMaricao Municipio 16 kmGuayanilla Municipio 16 kmHormigueros Municipio 21 kmLas Marías Municipio 22 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
21 km below the surface
Felt
no reports yet
Nearest
Sabana Grande Municipio, 6 km N
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3311 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 1,000,000× the energy of this one
  3. Around the size people start to feel M 3.0 92× 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 18.0333, -66.9463. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Sabana Grande Municipio, PR 6 km (4 mi) S of here earthquakes near Sabana Grande Municipio
Guánica Municipio, PR 10 km (6 mi) NNW of here earthquakes near Guánica Municipio
Yauco Municipio, PR 11 km (7 mi) WSW of here earthquakes near Yauco Municipio
Lajas Municipio, PR 12 km (7 mi) ENE of here earthquakes near Lajas Municipio
San Germán Municipio, PR 13 km (8 mi) SE of here earthquakes near San Germán Municipio
Maricao Municipio, PR 16 km (10 mi) S of here earthquakes near Maricao 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. 2.5 11 km WNW of Puerto Real, Puerto Rico
  2. 2.2 5 km NNW of Puerto Real, Puerto Rico
  3. 2.0 4 km W of Las Marías, Puerto Rico
  4. 2.1 4 km ESE of Las Marías, Puerto Rico
  5. 1.8 2 km SSW of Palmarejo, Puerto Rico
  6. 1.9 8 km SSE of Pole Ojea, Puerto Rico
  7. 2.1 9 km S of Pole Ojea, Puerto Rico
  8. 2.3 22 km W of Puerto Real, Puerto Rico
  9. 1.6 0 km ESE of Villalba, Puerto Rico
  10. 2.7 6 km SE of Espino, Puerto Rico
  11. 2.0 1 km WNW of Lluveras, Puerto Rico
  12. 2.1 5 km WSW of Rincón, Puerto Rico
  13. 2.2 7 km WSW of La Playa, Puerto Rico
  14. 2.9 2 km NNW of Boquerón, Puerto Rico
  15. 2.1 0 km NNW of Hormigueros, 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.