QuakeIndex

Earthquake · reviewed by a seismologist

M 1.7md

0 km ENE of Sabana Grande, Puerto Rico

· 4.7 km deep · released about 9.3 lb of TNT

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10 km30 km60 km120 km N Sabana Grande Municipio 1 kmSan Germán Municipio 9 kmYauco Municipio 10 kmMaricao Municipio 11 kmLajas Municipio 14 kmGuánica Municipio 15 kmLas Marías Municipio 17 kmHormigueros Municipio 18 kmGuayanilla Municipio 19 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
4.7 km below the surface
Felt
no reports yet
Nearest
Sabana Grande Municipio, 1 km ENE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1266 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 9.3 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 1,600,000× 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 3.0 100× the energy of this one
  4. This earthquake M 1.7 about 9.3 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 18.0795, -66.9562. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Sabana Grande Municipio, PR 1 km (1 mi) WSW of here earthquakes near Sabana Grande Municipio
San Germán Municipio, PR 9 km (6 mi) ESE of here earthquakes near San Germán Municipio
Yauco Municipio, PR 10 km (6 mi) W of here earthquakes near Yauco Municipio
Maricao Municipio, PR 11 km (7 mi) SSW of here earthquakes near Maricao Municipio
Lajas Municipio, PR 14 km (9 mi) NE of here earthquakes near Lajas 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

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

  1. 2.2 6 km WSW of Guánica, Puerto Rico
  2. 2.5 Puerto Rico region
  3. 1.9 1 km WSW of Indios, Puerto Rico
  4. 2.2 4 km S of Guánica, Puerto Rico
  5. 2.1 2 km SSW of Liborio Negron Torres, Puerto Rico
  6. 2.5 3 km ESE of Las Marías, Puerto Rico
  7. 2.7 3 km SW of Indios, Puerto Rico
  8. 2.3 Puerto Rico region
  9. 2.2 4 km WSW of Fuig, Puerto Rico
  10. 2.3 Puerto Rico region
  11. 2.5 4 km WSW of Guánica, Puerto Rico
  12. 2.4 4 km WSW of Fuig, Puerto Rico
  13. 2.3 4 km WSW of Guánica, Puerto Rico
  14. 2.5 6 km WSW of Guánica, Puerto Rico
  15. 2.3 Puerto Rico region

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.

For this area

The largest earthquake within 50 km in our catalogue was M 6.4 on 2020-01-07 — it released about 13,000,000 times the energy of this one.

From the QuakeIndex catalogue, built from the USGS FDSN event service.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.