QuakeIndex

Earthquake · reviewed by a seismologist

M 3.3md

3 km E of Guayabal, Puerto Rico

· 20 km deep · released about 1.3 tons of TNT

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10 km30 km60 km120 km N Villalba Municipio 5 kmJuana Díaz Municipio 10 kmCoamo Municipio 11 kmOrocovis Municipio 15 kmSanta Isabel Municipio 17 kmPonce Municipio 18 kmJayuya Municipio 19 kmBarranquitas Municipio 21 kmAibonito Municipio 22 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
20 km below the surface
Felt
1 report · strongest reported intensity I
Nearest
Villalba Municipio, 5 km N
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 674 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 1.3 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 6.7 130,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 5,800× the energy of this one
  3. Magna, Utah 2020 M 5.7 4,100× the energy of this one
  4. This earthquake M 3.3 about 1.3 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 2.7× 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 18.0873, -66.4643. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Villalba Municipio, PR 5 km (3 mi) S of here earthquakes near Villalba Municipio
Juana Díaz Municipio, PR 10 km (6 mi) NNE of here earthquakes near Juana Díaz Municipio
Coamo Municipio, PR 11 km (7 mi) W of here earthquakes near Coamo Municipio
Orocovis Municipio, PR 15 km (9 mi) S of here earthquakes near Orocovis Municipio
Santa Isabel Municipio, PR 17 km (11 mi) NNW of here earthquakes near Santa Isabel Municipio
Ponce Municipio, PR 18 km (11 mi) ENE of here earthquakes near Ponce Municipio

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

Aftershocks so far

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

  1. 2.2 2 km N of Palomas, Puerto Rico
  2. 2.8 1 km SE of Naranjito, Puerto Rico
  3. 2.0 6 km NE of Sabana Grande, Puerto Rico
  4. 2.8 2 km NW of Indios, Puerto Rico
  5. 2.5 2 km SSE of Indios, Puerto Rico
  6. 2.7 3 km SSE of Maria Antonia, Puerto Rico
  7. 2.3 2 km SSE of Magas Arriba, Puerto Rico
  8. 2.5 0 km N of Magas Arriba, Puerto Rico
  9. 3.4 1 km ENE of Magas Arriba, Puerto Rico
  10. 2.5 11 km SSE of Guánica, Puerto Rico
  11. 2.5 8 km SSE of Maria Antonia, Puerto Rico
  12. 2.5 4 km SSE of Tallaboa, Puerto Rico
  13. 2.1 1 km NNE of Magas Arriba, Puerto Rico
  14. 3.1 1 km ENE of Magas Arriba, Puerto Rico
  15. 3.0 7 km SSE of Maria Antonia, 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 46,000 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.