QuakeIndex

Earthquake · reviewed by a seismologist

M 1.9md

3 km W of Sabana Grande, Puerto Rico

· 20 km deep · released about 19 lb of TNT

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10 km30 km60 km120 km N Sabana Grande Municipio 5 kmSan Germán Municipio 6 kmMaricao Municipio 12 kmLajas Municipio 12 kmYauco Municipio 14 kmHormigueros Municipio 14 kmLas Marías Municipio 16 kmGuánica Municipio 16 kmCabo Rojo 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 1.9 (md)
Depth
20 km below the surface
Felt
no reports yet
Nearest
Sabana Grande Municipio, 5 km E
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2935 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 19 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 810,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 580,000× the energy of this one
  3. Around the size people start to feel M 3.0 51× the energy of this one
  4. This earthquake M 1.9 about 19 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 18.0805, -66.9928. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Sabana Grande Municipio, PR 5 km (3 mi) W of here earthquakes near Sabana Grande Municipio
San Germán Municipio, PR 6 km (3 mi) ESE of here earthquakes near San Germán Municipio
Maricao Municipio, PR 12 km (7 mi) SSW of here earthquakes near Maricao Municipio
Lajas Municipio, PR 12 km (8 mi) NNE of here earthquakes near Lajas Municipio
Yauco Municipio, PR 14 km (9 mi) W of here earthquakes near Yauco Municipio
Hormigueros Municipio, PR 14 km (9 mi) ESE of here earthquakes near Hormigueros Municipio

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

Aftershocks so far

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

  1. 1.7 Puerto Rico region
  2. 1.5 7 km SSE of La Parguera, Puerto Rico
  3. 2.2 6 km NW of Sabana Grande, Puerto Rico
  4. 2.0 1 km SW of Maricao, Puerto Rico
  5. 2.0 1 km NW of Palomas, Puerto Rico
  6. 1.9 3 km SE of Maricao, Puerto Rico
  7. 2.0 3 km ENE of Mayagüez, Puerto Rico
  8. 2.1 9 km S of Guánica, Puerto Rico
  9. 2.0 5 km NE of Hormigueros, Puerto Rico
  10. 2.1 2 km SSE of Ponce, Puerto Rico
  11. 2.5 3 km NW of Mayagüez, Puerto Rico
  12. 1.9 7 km S of Tallaboa, Puerto Rico
  13. 1.6 8 km S of Tallaboa, Puerto Rico
  14. 2.2 9 km WNW of Rincón, Puerto Rico
  15. 2.1 8 km S of Tallaboa, 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.