QuakeIndex

Earthquake · reviewed by a seismologist

M 3.3md

Earthquake near Comerío, PR

No earthquake was likely felt in Comerío in the 24 hours to 6:39 am AST (10:39 UTC). The last one was M 3.3, 44 km (27 mi) SSW, at 8:40 am AST on 1 November 2026, estimated intensity II (weak) in town. Every earthquake near Comerío

This page: a magnitude 3.3 earthquake was recorded in Comerío, PR, at 10:46 pm AST on 29 August 2022 (02:46 UTC), 10 km deep.

USGS: 1 km S of Comerío, Puerto Rico

28 km (17 mi) SW of San Juan, PR · 20 km (12 mi) W of Caguas, PR

10:46 pm AST, Aug 29, 2022 · · 10 km deep · released about 1.1 tons of TNT

Every earthquake near Comerío Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Comerío Municipio 2 kmCidra Municipio 7 kmBarranquitas Municipio 9 kmAibonito Municipio 9 kmNaranjito Municipio 10 kmAguas Buenas Municipio 12 kmCayey Municipio 14 kmCorozal Municipio 15 kmBayamón Municipio 17 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
10:46 pm AST on 29 August 2022 ()
Where
in Comerío, PR · earthquakes near Comerío
Magnitude
M 3.3 (md)
Depth
10 km below the surface
Felt
no reports yet
Nearest
Comerío Municipio, 2 km NNE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1530 days ago

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

At this magnitude and depth, people at rest would likely notice it out to about 48 km (30 mi) from the epicentre. Estimated from magnitude, depth and distance with the intensity equation USGS Did You Feel It? uses; felt reports, where there are any, are the measurement.

Likely felt in: Sumidero 10 km, intensity III · Cayey 12 km, intensity III · Corozal 18 km, intensity III · Caguas 19 km, intensity III · Coamo 20 km, intensity II · Guaynabo 21 km, intensity II · Bayamón 23 km, intensity II · Jagual 25 km, intensity II. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 1.1 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 6.7 150,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 6,700× the energy of this one
  3. Magna, Utah 2020 M 5.7 4,700× the energy of this one
  4. This earthquake M 3.3 about 1.1 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 2.4× 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.

For this area

The largest earthquake within 50 km since 2016 was M 4.6 on 2016-12-05 — about 110 times the energy of this one.

Before 2016, the USGS record lists 2 earthquakes of M5 or more within 50 km:

  1. 5.1 3 km W of Aguas Buenas, Puerto Rico · 11 km ENE of this epicentre
  2. 5.0 3 km N of Brenas, Puerto Rico · 35 km NNW of this epicentre

Since 2016: the QuakeIndex catalogue (US, M1.5+), built from the USGS FDSN event service. Before 2016: USGS ComCat, M5+ from 1900. Distances are between epicentres. This is the record, not a forecast.

Where

Epicentre 18.2043, -66.2238. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Comerío Municipio, PR 2 km (1 mi) NNE earthquakes near Comerío Municipio
Cidra Municipio, PR 7 km (5 mi) ESE earthquakes near Cidra Municipio
Barranquitas Municipio, PR 9 km (6 mi) W earthquakes near Barranquitas Municipio
Aibonito Municipio, PR 9 km (6 mi) SSW earthquakes near Aibonito Municipio
Naranjito Municipio, PR 10 km (6 mi) NNW earthquakes near Naranjito Municipio
Aguas Buenas Municipio, PR 12 km (7 mi) ENE earthquakes near Aguas Buenas Municipio

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

Aftershocks so far

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

  1. 3.3 5 km SSW of Potala Pastillo, Puerto Rico
  2. 2.4 5 km S of Potala Pastillo, Puerto Rico
  3. 2.6 Puerto Rico region
  4. 2.2 6 km SSW of Potala Pastillo, Puerto Rico
  5. 3.0 5 km SSW of Potala Pastillo, Puerto Rico
  6. 2.8 6 km SSW of Potala Pastillo, Puerto Rico
  7. 2.9 3 km SW of Potala Pastillo, Puerto Rico
  8. 3.0 5 km SSW of Potala Pastillo, Puerto Rico
  9. 2.2 4 km SSW of Capitanejo, Puerto Rico
  10. 3.0 5 km SW of Potala Pastillo, Puerto Rico
  11. 3.4 4 km SSW of Potala Pastillo, Puerto Rico
  12. 3.4 5 km SSW of Potala Pastillo, Puerto Rico
  13. 3.6 5 km E of Candelero Arriba, Puerto Rico
  14. 3.0 11 km NNW of Brenas, Puerto Rico
  15. 2.8 5 km NNW of Dorado, 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.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.