QuakeIndex

Earthquake · reviewed by a seismologist

M 3.1md

13 km SSE of Guánica, Puerto Rico

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

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10 km30 km60 km120 km N Guánica Municipio 12 kmGuayanilla Municipio 18 kmLajas Municipio 23 kmPeñuelas Municipio 24 kmYauco Municipio 26 kmSabana Grande Municipio 27 kmPonce Municipio 32 kmSan Germán Municipio 33 kmMaricao Municipio 36 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
14 km below the surface
Felt
5 reports · strongest reported intensity V
Nearest
Guánica Municipio, 12 km NNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2413 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 5 people have reported feeling it to USGS.

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 17.8536, -66.8698. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Guánica Municipio, PR 12 km (7 mi) SSE of here earthquakes near Guánica Municipio
Guayanilla Municipio, PR 18 km (11 mi) SSW of here earthquakes near Guayanilla Municipio
Lajas Municipio, PR 23 km (14 mi) SE of here earthquakes near Lajas Municipio
Peñuelas Municipio, PR 24 km (15 mi) SW of here earthquakes near Peñuelas Municipio
Yauco Municipio, PR 26 km (16 mi) S of here earthquakes near Yauco Municipio
Sabana Grande Municipio, PR 27 km (17 mi) SSE of here earthquakes near Sabana Grande 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. 3.1 6 km SE of Maria Antonia, Puerto Rico
  2. 3.3 8 km SW of Tallaboa, Puerto Rico
  3. 2.8 17 km SSE of Maria Antonia, Puerto Rico
  4. 2.4 6 km S of Tallaboa, Puerto Rico
  5. 2.2 5 km S of Indios, Puerto Rico
  6. 2.3 Puerto Rico region
  7. 2.3 1 km ENE of La Parguera, Puerto Rico
  8. 2.5 9 km S of Indios, Puerto Rico
  9. 2.4 7 km SSE of Maria Antonia, Puerto Rico
  10. 2.5 7 km SSE of Guánica, Puerto Rico
  11. 2.7 14 km SSE of Guánica, Puerto Rico
  12. 2.2 Puerto Rico region
  13. 2.5 12 km S of Indios, Puerto Rico
  14. 2.9 8 km SE of Maria Antonia, Puerto Rico
  15. 2.7 5 km SW of Guánica, 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.