QuakeIndex

Earthquake · reviewed by a seismologist

M 2.9md

Earthquake near Coquí, PR

No earthquake was likely felt in Coquí in the 24 hours to 10:14 am AST (14:14 UTC). The last one was M 3.0, 24 km (15 mi) SW, at 7:09 pm AST on 5 November 2026, estimated intensity II (weak) in town. Every earthquake near Coquí

This page: a magnitude 2.9 earthquake was recorded in Coquí, PR, at 6:43 pm AST on 2 September 2023 (22:43 UTC), 15 km deep.

USGS: 1 km WSW of Coquí, Puerto Rico

52 km (32 mi) SSW of San Juan, PR · 36 km (23 mi) SW of Caguas, PR

6:43 pm AST, Sep 2, 2023 · · 15 km deep · released about 700 lb of TNT

Every earthquake near Coquí Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Salinas Municipio 2 kmGuayama Municipio 11 kmSanta Isabel Municipio 16 kmCayey Municipio 18 kmAibonito Municipio 19 kmCoamo Municipio 20 kmArroyo Municipio 21 kmCidra Municipio 25 kmJuana Díaz Municipio 27 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
6:43 pm AST on 2 September 2023 ()
Where
in Coquí, PR · earthquakes near Coquí
Magnitude
M 2.9 (md)
Depth
15 km below the surface
Felt
no reports yet
Nearest
Salinas Municipio, 2 km WNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1166 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 28 km (17 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: Guayama 14 km, intensity II · Santa Isabel 17 km, intensity II · Coamo 18 km, intensity II · Cayey 18 km, intensity II · Río Cañas Abajo 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 700 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 22,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 15,000× the energy of this one
  3. Around the size people start to feel M 3.0 1.4× the energy of this one
  4. This earthquake M 2.9 about 700 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 5.0 on 2020-01-07 — about 1,400 times the energy of this one.

Before 2016, the USGS record lists one earthquake of M5 or more within 50 km:

  1. 5.1 3 km W of Aguas Buenas, Puerto Rico · 35 km NNE 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 17.9657, -66.2407. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Salinas Municipio, PR 2 km (1 mi) WNW earthquakes near Salinas Municipio
Guayama Municipio, PR 11 km (7 mi) E earthquakes near Guayama Municipio
Santa Isabel Municipio, PR 16 km (10 mi) W earthquakes near Santa Isabel Municipio
Cayey Municipio, PR 18 km (11 mi) NNE earthquakes near Cayey Municipio
Aibonito Municipio, PR 19 km (12 mi) N earthquakes near Aibonito Municipio
Coamo Municipio, PR 20 km (12 mi) NW earthquakes near Coamo Municipio

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

Aftershocks so far

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

  1. 2.1 4 km S of Salinas, Puerto Rico
  2. 2.6 4 km SSE of Salinas, Puerto Rico
  3. 2.7 3 km S of Salinas, Puerto Rico
  4. 3.0 5 km SSE of Salinas, Puerto Rico
  5. 2.7 3 km SSE of Salinas, Puerto Rico
  6. 2.6 4 km SSE of Salinas, Puerto Rico
  7. 2.4 6 km S of Salinas, Puerto Rico
  8. 2.7 Puerto Rico region
  9. 2.5 4 km SSE of Salinas, Puerto Rico
  10. 2.5 Puerto Rico region
  11. 2.8 1 km SSW of Cidra, Puerto Rico
  12. 2.4 6 km SSE of Salinas, Puerto Rico
  13. 2.3 4 km SSE of Salinas, Puerto Rico
  14. 2.7 6 km SSE of Salinas, Puerto Rico
  15. 2.7 5 km SSE of Salinas, 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.