QuakeIndex

Earthquake · reviewed by a seismologist

M 1.7md

2 km WSW of Sabana Grande, Puerto Rico

· 8.0 km deep · released about 11 lb of TNT

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10 km30 km60 km120 km N Sabana Grande Municipio 4 kmSan Germán Municipio 7 kmLajas Municipio 12 kmMaricao Municipio 12 kmYauco Municipio 13 kmGuánica Municipio 15 kmHormigueros Municipio 16 kmLas Marías Municipio 18 kmGuayanilla 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
8.0 km below the surface
Felt
no reports yet
Nearest
Sabana Grande Municipio, 4 km ENE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2743 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 11 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 1,300,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 930,000× the energy of this one
  3. Around the size people start to feel M 3.0 83× the energy of this one
  4. This earthquake M 1.7 about 11 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 18.0700, -66.9793. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Sabana Grande Municipio, PR 4 km (2 mi) WSW of here earthquakes near Sabana Grande Municipio
San Germán Municipio, PR 7 km (5 mi) SE of here earthquakes near San Germán Municipio
Lajas Municipio, PR 12 km (7 mi) NNE of here earthquakes near Lajas Municipio
Maricao Municipio, PR 12 km (8 mi) SSW of here earthquakes near Maricao Municipio
Yauco Municipio, PR 13 km (8 mi) W of here earthquakes near Yauco Municipio
Guánica Municipio, PR 15 km (9 mi) NNW of here earthquakes near Guánica Municipio

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

Aftershocks so far

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

  1. 2.0 15 km S of Ponce, Puerto Rico
  2. 2.1 6 km NNE of Sabana Eneas, Puerto Rico
  3. 2.0 8 km SW of Pole Ojea, Puerto Rico
  4. 2.1 3 km NE of Liborio Negron Torres, Puerto Rico
  5. 1.9 1 km W of Puerto Real, Puerto Rico
  6. 2.3 12 km SW of La Playa, Puerto Rico
  7. 1.8 15 km WSW of Puerto Real, Puerto Rico
  8. 2.4 19 km W of Puerto Real, Puerto Rico
  9. 2.8 20 km WNW of Puerto Real, Puerto Rico
  10. 2.0 3 km S of Guánica, Puerto Rico
  11. 1.9 6 km NNW of Santo Domingo, Puerto Rico
  12. 1.7 11 km NE of Sabana Grande, Puerto Rico
  13. 2.0 4 km SSE of Espino, Puerto Rico
  14. 1.5 3 km NNE of Mayagüez, Puerto Rico
  15. 2.3 18 km S of La Parguera, 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.