QuakeIndex

Earthquake · reviewed by a seismologist

M 2.6md

Earthquake near Coamo, PR

No earthquake was likely felt in Coamo in the 24 hours to 5:50 pm AST (21:50 UTC). The last one was M 2.2, 6 km (4 mi) S, at 5:05 pm AST on 8 November 2026, estimated intensity II (weak) in town. Every earthquake near Coamo

This page: a magnitude 2.6 earthquake was recorded 8 km (5 mi) east of Coamo, PR, at 11:41 pm AST on 4 July 2022 (03:41 UTC), 27 km deep.

USGS: 4 km E of Palmarejo, Puerto Rico

44 km (27 mi) SSW of San Juan, PR · 32 km (20 mi) SW of Caguas, PR

11:41 pm AST, Jul 4, 2022 · · 27 km deep · released about 250 lb of TNT

Every earthquake near Coamo Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Aibonito Municipio 7 kmCoamo Municipio 8 kmSalinas Municipio 12 kmBarranquitas Municipio 14 kmCayey Municipio 15 kmSanta Isabel Municipio 17 kmCidra Municipio 17 kmComerío Municipio 18 kmGuayama 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
11:41 pm AST on 4 July 2022 ()
Where
8 km (5 mi) east of Coamo, PR · earthquakes near Coamo
Magnitude
M 2.6 (md)
Depth
27 km below the surface
Felt
no reports yet
Nearest
Aibonito Municipio, 7 km NNE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1591 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 it was probably too small to be felt, even directly above it. In Coamo, 8 km away, the estimate is intensity II (weak). 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.

Earthquakes near other towns within 30 km: Vázquez, Pastos, Mariano Colón, Aibonito, Coco, La Plena.

How big was it?

This earthquake released about 250 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.6 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 61,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 43,000× the energy of this one
  3. Around the size people start to feel M 3.0 3.8× the energy of this one
  4. This earthquake M 2.6 about 250 lb of TNT

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 5.4 on 2020-05-02 — about 15,000 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 · 26 km NE of this epicentre
  2. 5.0 3 km N of Brenas, Puerto Rico · 48 km N 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 18.0728, -66.2865. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Aibonito Municipio, PR 7 km (4 mi) NNE earthquakes near Aibonito Municipio
Coamo Municipio, PR 8 km (5 mi) WNW earthquakes near Coamo Municipio
Salinas Municipio, PR 12 km (7 mi) SSE earthquakes near Salinas Municipio
Barranquitas Municipio, PR 14 km (9 mi) N earthquakes near Barranquitas Municipio
Cayey Municipio, PR 15 km (9 mi) ENE earthquakes near Cayey Municipio
Santa Isabel Municipio, PR 17 km (11 mi) SW earthquakes near Santa Isabel Municipio

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

Aftershocks so far

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

  1. 2.1 4 km SSE of Cayey, Puerto Rico
  2. 2.5 2 km S of Santo Domingo, Puerto Rico
  3. 2.0 2 km WSW of Tallaboa, Puerto Rico
  4. 3.4 18 km S of Jobos, Puerto Rico
  5. 2.5 2 km SW of San Antonio, Puerto Rico
  6. 2.3 7 km SE of Tallaboa, Puerto Rico
  7. 2.1 13 km SSE of Ponce, Puerto Rico
  8. 2.2 13 km S of Jauca, Puerto Rico
  9. 2.4 4 km SW of Tallaboa, Puerto Rico
  10. 2.9 14 km S of Jauca, Puerto Rico
  11. 3.3 15 km S of Jauca, Puerto Rico
  12. 3.3 1 km SE of Toa Baja, Puerto Rico
  13. 2.1 5 km ESE of Tallaboa, Puerto Rico
  14. 1.6 2 km E of Magas Arriba, Puerto Rico
  15. 2.2 2 km E of Magas Arriba, 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.