QuakeIndex

Earthquake · reviewed by a seismologist

M 3.3md

5 km SW of Central Aguirre, Puerto Rico

· 7.7 km deep · released about 1.3 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Salinas Municipio 6 kmSanta Isabel Municipio 14 kmGuayama Municipio 14 kmCoamo Municipio 23 kmCayey Municipio 23 kmAibonito Municipio 24 kmArroyo Municipio 24 kmJuana Díaz Municipio 26 kmCidra Municipio 30 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
7.7 km below the surface
Felt
1 report · strongest reported intensity II
Nearest
Salinas Municipio, 6 km N
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1387 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 5,600× the energy of this one
  3. Magna, Utah 2020 M 5.7 4,000× 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 2.8× 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 17.9192, -66.2597. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Salinas Municipio, PR 6 km (4 mi) S of here earthquakes near Salinas Municipio
Santa Isabel Municipio, PR 14 km (9 mi) ESE of here earthquakes near Santa Isabel Municipio
Guayama Municipio, PR 14 km (9 mi) WSW of here earthquakes near Guayama Municipio
Coamo Municipio, PR 23 km (14 mi) SSE of here earthquakes near Coamo Municipio
Cayey Municipio, PR 23 km (15 mi) SSW of here earthquakes near Cayey Municipio
Aibonito Municipio, PR 24 km (15 mi) S of here earthquakes near Aibonito Municipio

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

Aftershocks so far

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

  1. 2.5 5 km SSW of Potala Pastillo, Puerto Rico
  2. 2.7 2 km WNW of Gurabo, Puerto Rico
  3. 2.7 18 km SSE of Arroyo, Puerto Rico
  4. 2.3 4 km W of Las Piedras, Puerto Rico
  5. 2.4 7 km WNW of Coto Laurel, Puerto Rico
  6. 2.0 2 km NW of Coto Laurel, Puerto Rico
  7. 2.2 3 km S of Potala Pastillo, Puerto Rico
  8. 3.3 5 km NW of Aguas Buenas, Puerto Rico
  9. 2.1 5 km NNE of Ponce, Puerto Rico
  10. 2.7 0 km N of Santa Isabel, Puerto Rico
  11. 2.5 7 km ENE of Jayuya, Puerto Rico
  12. 2.1 3 km SSW of Capitanejo, Puerto Rico
  13. 2.4 1 km S of Tallaboa, Puerto Rico
  14. 2.1 2 km S of Capitanejo, Puerto Rico
  15. 2.1 6 km SW of Potala Pastillo, 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 5.6 on 2020-01-07 — it released about 2,800 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.