QuakeIndex

Earthquake · reviewed by a seismologist

M 3.3md

2 km WNW of Fuig, Puerto Rico

· 12 km deep · released about 1.4 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Guánica Municipio 6 kmSabana Grande Municipio 10 kmLajas Municipio 11 kmYauco Municipio 13 kmGuayanilla Municipio 15 kmSan Germán Municipio 16 kmMaricao Municipio 20 kmPeñuelas Municipio 22 kmHormigueros Municipio 24 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 3.3 (md)
Depth
12 km below the surface
Felt
5 reports · strongest reported intensity IV
Nearest
Guánica Municipio, 6 km SSE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 870 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 1.4 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.3 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 120,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 5,200× the energy of this one
  3. Magna, Utah 2020 M 5.7 3,700× the energy of this one
  4. This earthquake M 3.3 about 1.4 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 3× 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 17.9985, -66.9361. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Guánica Municipio, PR 6 km (4 mi) NNW of here earthquakes near Guánica Municipio
Sabana Grande Municipio, PR 10 km (6 mi) S of here earthquakes near Sabana Grande Municipio
Lajas Municipio, PR 11 km (7 mi) ENE of here earthquakes near Lajas Municipio
Yauco Municipio, PR 13 km (8 mi) SW of here earthquakes near Yauco Municipio
Guayanilla Municipio, PR 15 km (9 mi) W of here earthquakes near Guayanilla Municipio
San Germán Municipio, PR 16 km (10 mi) SE of here earthquakes near San Germán 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. 1.8 2 km WNW of Guayanilla, Puerto Rico
  2. 1.9 2 km NE of Fuig, Puerto Rico
  3. 2.4 3 km ESE of Maria Antonia, Puerto Rico
  4. 2.2 3 km NNW of Guayanilla, Puerto Rico
  5. 2.3 11 km S of Guánica, Puerto Rico
  6. 2.3 4 km SE of Maria Antonia, Puerto Rico
  7. 2.5 8 km S of Guánica, Puerto Rico
  8. 2.3 6 km WSW of La Parguera, Puerto Rico
  9. 2.5 3 km S of Magas Arriba, Puerto Rico
  10. 2.2 6 km SSE of Maria Antonia, Puerto Rico
  11. 2.3 3 km SE of Maria Antonia, Puerto Rico
  12. 2.1 3 km SE of Maria Antonia, Puerto Rico
  13. 2.1 3 km SE of Indios, Puerto Rico
  14. 2.6 3 km SSW of Indios, Puerto Rico
  15. 2.2 1 km W of Yauco, 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 42,000 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.