QuakeIndex

Earthquake · reviewed by a seismologist

M 3.1md

3 km WSW of La Parguera, Puerto Rico

· 6.9 km deep · released about 1,400 lb of TNT

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10 km30 km60 km120 km N Lajas Municipio 4 kmCabo Rojo Municipio 12 kmGuánica Municipio 16 kmSan Germán Municipio 17 kmSabana Grande Municipio 19 kmHormigueros Municipio 20 kmYauco Municipio 26 kmMaricao Municipio 28 kmGuayanilla Municipio 29 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 3.1 (md)
Depth
6.9 km below the surface
Felt
no reports yet
Nearest
Lajas Municipio, 4 km ENE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1181 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.

How big was it?

This earthquake released about 1,400 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.1 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 240,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 11,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 7,700× the energy of this one
  4. This earthquake M 3.1 about 1,400 lb of TNT
  5. Around the size people start to feel M 3.0 this one released 1.5× more

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 17.9627, -67.0723. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Lajas Municipio, PR 4 km (2 mi) WSW of here earthquakes near Lajas Municipio
Cabo Rojo Municipio, PR 12 km (8 mi) ESE of here earthquakes near Cabo Rojo Municipio
Guánica Municipio, PR 16 km (10 mi) W of here earthquakes near Guánica Municipio
San Germán Municipio, PR 17 km (10 mi) SSW of here earthquakes near San Germán Municipio
Sabana Grande Municipio, PR 19 km (12 mi) SW of here earthquakes near Sabana Grande Municipio
Hormigueros Municipio, PR 20 km (12 mi) SSE of here earthquakes near Hormigueros Municipio

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

Aftershocks so far

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

  1. 2.2 Puerto Rico region
  2. 2.9 1 km WSW of Indios, Puerto Rico
  3. 2.5 8 km S of Indios, Puerto Rico
  4. 2.4 0 km SW of Maria Antonia, Puerto Rico
  5. 2.4 16 km S of Ponce, Puerto Rico
  6. 2.5 Mona Passage
  7. 2.7 24 km WSW of Stella, Puerto Rico
  8. 2.7 1 km ESE of Hormigueros, Puerto Rico
  9. 2.5 5 km SSW of Guánica, Puerto Rico
  10. 2.6 1 km WNW of Fuig, Puerto Rico
  11. 2.0 4 km SSE of Maricao, Puerto Rico
  12. 2.3 0 km W of Guayanilla, Puerto Rico
  13. 2.5 4 km ESE of Maria Antonia, Puerto Rico
  14. 2.9 0 km NE of Magas Arriba, Puerto Rico
  15. 2.4 0 km NE of Guayanilla, 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 86,000 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.