QuakeIndex

Earthquake · reviewed by a seismologist

M 3.3md

15 km S of Jauca, Puerto Rico

· 4.4 km deep · released about 1.2 tons of TNT

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10 km30 km60 km120 km N Santa Isabel Municipio 14 kmSalinas Municipio 19 kmJuana Díaz Municipio 23 kmGuayama Municipio 28 kmCoamo Municipio 30 kmPonce Municipio 32 kmAibonito Municipio 35 kmVillalba Municipio 35 kmArroyo Municipio 37 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
4.4 km below the surface
Felt
no reports yet
Nearest
Santa Isabel Municipio, 14 km NNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1461 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.

How big was it?

This earthquake released about 1.2 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 6.7 140,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 6,500× the energy of this one
  3. Magna, Utah 2020 M 5.7 4,600× the energy of this one
  4. This earthquake M 3.3 about 1.2 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 2.5× 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 17.8330, -66.3617. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Santa Isabel Municipio, PR 14 km (8 mi) SSE of here earthquakes near Santa Isabel Municipio
Salinas Municipio, PR 19 km (12 mi) SW of here earthquakes near Salinas Municipio
Juana Díaz Municipio, PR 23 km (14 mi) SE of here earthquakes near Juana Díaz Municipio
Guayama Municipio, PR 28 km (18 mi) WSW of here earthquakes near Guayama Municipio
Coamo Municipio, PR 30 km (19 mi) S of here earthquakes near Coamo Municipio
Ponce Municipio, PR 32 km (20 mi) SE of here earthquakes near Ponce Municipio

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

Aftershocks so far

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

  1. 1.9 2 km E of Indios, Puerto Rico
  2. 2.3 2 km ESE of Magas Arriba, Puerto Rico
  3. 2.1 2 km N of Magas Arriba, Puerto Rico
  4. 2.4 6 km ESE of Villalba, Puerto Rico
  5. 2.8 0 km NNW of Magas Arriba, Puerto Rico
  6. 3.0 1 km ENE of Guayanilla, Puerto Rico
  7. 2.3 11 km S of Tallaboa, Puerto Rico
  8. 2.7 0 km NE of Magas Arriba, Puerto Rico
  9. 2.1 4 km SSE of Cayey, Puerto Rico
  10. 2.5 2 km S of Santo Domingo, Puerto Rico
  11. 2.0 2 km WSW of Tallaboa, Puerto Rico
  12. 3.4 18 km S of Jobos, Puerto Rico
  13. 2.3 7 km SE of Tallaboa, Puerto Rico
  14. 2.1 13 km SSE of Ponce, Puerto Rico
  15. 2.2 13 km S of Jauca, 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 51,000 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.