QuakeIndex

Earthquake · reviewed by a seismologist

M 1.7md

11 km NE of Sabana Grande, Puerto Rico

· 21 km deep · released about 10 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Yauco Municipio 6 kmMaricao Municipio 8 kmSabana Grande Municipio 10 kmAdjuntas Municipio 13 kmLas Marías Municipio 15 kmLares Municipio 16 kmGuayanilla Municipio 17 kmSan Germán Municipio 18 kmPeñuelas Municipio 20 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
Yauco Municipio, 6 km SSE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2730 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 18.1361, -66.8741. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Yauco Municipio, PR 6 km (4 mi) NNW of here earthquakes near Yauco Municipio
Maricao Municipio, PR 8 km (5 mi) ESE of here earthquakes near Maricao Municipio
Sabana Grande Municipio, PR 10 km (6 mi) NE of here earthquakes near Sabana Grande Municipio
Adjuntas Municipio, PR 13 km (8 mi) WSW of here earthquakes near Adjuntas Municipio
Las Marías Municipio, PR 15 km (9 mi) SE of here earthquakes near Las Marías Municipio
Lares Municipio, PR 16 km (10 mi) S of here earthquakes near Lares Municipio

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

Aftershocks so far

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

  1. 1.8 13 km WNW of Puerto Real, Puerto Rico
  2. 2.0 18 km S of Indios, Puerto Rico
  3. 1.7 8 km SW of La Parguera, Puerto Rico
  4. 1.7 6 km WSW of Pole Ojea, Puerto Rico
  5. 2.0 2 km SW of Monte Grande, Puerto Rico
  6. 1.8 6 km W of Pole Ojea, Puerto Rico
  7. 1.9 4 km W of Cayuco, Puerto Rico
  8. 2.1 3 km NE of Pole Ojea, Puerto Rico
  9. 1.7 18 km SSW of Tallaboa, Puerto Rico
  10. 1.6 10 km WNW of Puerto Real, Puerto Rico
  11. 1.9 11 km W of Puerto Real, Puerto Rico
  12. 1.9 11 km E of Maricao, Puerto Rico
  13. 1.6 3 km SSE of Adjuntas, Puerto Rico
  14. 1.6 3 km WNW of Santo Domingo, Puerto Rico
  15. 1.9 10 km WSW 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.