QuakeIndex

Earthquake · reviewed by a seismologist

M 3.1ml

24 km SSW of Guánica, Puerto Rico

· 25 km deep · released about 1,300 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Guánica Municipio 22 kmLajas Municipio 26 kmGuayanilla Municipio 33 kmCabo Rojo Municipio 36 kmSabana Grande Municipio 37 kmYauco Municipio 38 kmPeñuelas Municipio 39 kmSan Germán Municipio 40 kmHormigueros Municipio 45 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 (ml)
Depth
25 km below the surface
Felt
1 report · strongest reported intensity IV
Nearest
Guánica Municipio, 22 km N
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2269 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 1 person has reported feeling it to USGS.

How big was it?

This earthquake released about 1,300 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 6.7 250,000× 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 7,900× the energy of this one
  4. This earthquake M 3.1 about 1,300 lb of TNT
  5. Around the size people start to feel M 3.0 this one released 1.4× 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 17.7553, -66.9580. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Guánica Municipio, PR 22 km (14 mi) S of here earthquakes near Guánica Municipio
Lajas Municipio, PR 26 km (16 mi) SSE of here earthquakes near Lajas Municipio
Guayanilla Municipio, PR 33 km (20 mi) SSW of here earthquakes near Guayanilla Municipio
Cabo Rojo Municipio, PR 36 km (22 mi) SE of here earthquakes near Cabo Rojo Municipio
Sabana Grande Municipio, PR 37 km (23 mi) S of here earthquakes near Sabana Grande Municipio
Yauco Municipio, PR 38 km (24 mi) SSW of here earthquakes near Yauco 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. 3.0 11 km S of Guánica, Puerto Rico
  2. 2.0 3 km SE of Maria Antonia, Puerto Rico
  3. 2.6 9 km SSE of Maria Antonia, Puerto Rico
  4. 1.9 2 km SSW of Magas Arriba, Puerto Rico
  5. 2.3 5 km SE of Maria Antonia, Puerto Rico
  6. 2.4 7 km SSE of Maria Antonia, Puerto Rico
  7. 2.5 5 km SE of Maria Antonia, Puerto Rico
  8. 2.5 8 km SSE of Indios, Puerto Rico
  9. 2.7 5 km S of Indios, Puerto Rico
  10. 2.3 5 km SSW of Indios, Puerto Rico
  11. 2.8 11 km S of Guánica, Puerto Rico
  12. 2.6 4 km SSW of Tallaboa, Puerto Rico
  13. 2.6 6 km S of Guánica, Puerto Rico
  14. 2.9 8 km S of Indios, Puerto Rico
  15. 2.3 0 km N 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 89,000 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.