QuakeIndex

Earthquake · reviewed by a seismologist

M 3.1md

4 km SSW of Florida, Puerto Rico

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

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Florida Municipio 5 kmCiales Municipio 7 kmJayuya Municipio 13 kmUtuado Municipio 15 kmManatí Municipio 16 kmArecibo Municipio 16 kmBarceloneta Municipio 16 kmMorovis Municipio 16 kmOrocovis Municipio 19 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
123 km below the surface
Felt
1 report · strongest reported intensity I
Nearest
Florida Municipio, 5 km NNE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1393 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 1,400 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 6.7 230,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 10,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 7,400× 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 18.3255, -66.5743. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Florida Municipio, PR 5 km (3 mi) SSW of here earthquakes near Florida Municipio
Ciales Municipio, PR 7 km (4 mi) WNW of here earthquakes near Ciales Municipio
Jayuya Municipio, PR 13 km (8 mi) N of here earthquakes near Jayuya Municipio
Utuado Municipio, PR 15 km (9 mi) ENE of here earthquakes near Utuado Municipio
Manatí Municipio, PR 16 km (10 mi) SSW of here earthquakes near Manatí Municipio
Arecibo Municipio, PR 16 km (10 mi) SE of here earthquakes near Arecibo Municipio

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

Aftershocks so far

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

  1. 2.2 6 km SE of Maricao, Puerto Rico
  2. 2.5 0 km WNW of Magas Arriba, Puerto Rico
  3. 2.3 1 km WSW of Magas Arriba, Puerto Rico
  4. 1.8 2 km WSW of Indios, Puerto Rico
  5. 2.0 3 km SW of Indios, Puerto Rico
  6. 2.8 24 km N of Hatillo, Puerto Rico
  7. 2.2 0 km ESE of Magas Arriba, Puerto Rico
  8. 2.4 2 km ENE of Magas Arriba, Puerto Rico
  9. 2.4 0 km NW of Guayanilla, Puerto Rico
  10. 2.4 2 km S of Indios, Puerto Rico
  11. 2.0 1 km NNW of Indios, Puerto Rico
  12. 2.1 2 km ENE of Magas Arriba, Puerto Rico
  13. 2.0 2 km ENE of Magas Arriba, Puerto Rico
  14. 3.4 Puerto Rico region
  15. 2.6 2 km SSW of Tallaboa, 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 83,000 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.