QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1md

6 km SW of Liborio Negron Torres, Puerto Rico

· 9.2 km deep · released about 46 lb of TNT

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10 km30 km60 km120 km N Lajas Municipio 6 kmGuánica Municipio 10 kmSabana Grande Municipio 10 kmSan Germán Municipio 12 kmYauco Municipio 16 kmMaricao Municipio 19 kmHormigueros Municipio 20 kmGuayanilla Municipio 20 kmCabo Rojo 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 2.1 (md)
Depth
9.2 km below the surface
Felt
no reports yet
Nearest
Lajas Municipio, 6 km WSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1603 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 46 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.1 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 330,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 230,000× the energy of this one
  3. Around the size people start to feel M 3.0 21× the energy of this one
  4. This earthquake M 2.1 about 46 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 18.0073, -66.9893. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Lajas Municipio, PR 6 km (4 mi) ENE of here earthquakes near Lajas Municipio
Guánica Municipio, PR 10 km (6 mi) NW of here earthquakes near Guánica Municipio
Sabana Grande Municipio, PR 10 km (6 mi) SSW of here earthquakes near Sabana Grande Municipio
San Germán Municipio, PR 12 km (8 mi) SSE of here earthquakes near San Germán Municipio
Yauco Municipio, PR 16 km (10 mi) WSW of here earthquakes near Yauco Municipio
Maricao Municipio, PR 19 km (12 mi) SSW of here earthquakes near Maricao 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. 2.1 5 km WSW of Liborio Negron Torres, Puerto Rico
  2. 2.1 1 km S of Magas Arriba, Puerto Rico
  3. 1.9 5 km W of Fuig, Puerto Rico
  4. 2.5 5 km SE of Maria Antonia, Puerto Rico
  5. 2.1 3 km SSW of Magas Arriba, Puerto Rico
  6. 2.0 4 km SW of Palmarejo, Puerto Rico
  7. 2.1 2 km S of Guánica, Puerto Rico
  8. 1.9 2 km N of Magas Arriba, Puerto Rico
  9. 2.0 1 km NNE of Magas Arriba, Puerto Rico
  10. 2.7 7 km SW of Guánica, Puerto Rico
  11. 2.1 0 km SE of Guayanilla, Puerto Rico
  12. 2.6 2 km NNE of Magas Arriba, Puerto Rico
  13. 2.2 1 km NNE of Magas Arriba, Puerto Rico
  14. 2.5 0 km NE of Magas Arriba, Puerto Rico
  15. 3.3 0 km NNE of Magas Arriba, 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.

For this area

The largest earthquake within 50 km in our catalogue was M 6.4 on 2020-01-07 — it released about 2,600,000 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.