QuakeIndex

Earthquake · reviewed by a seismologist

M 1.7md

Earthquake near Coquí, PR

No earthquake was likely felt in Coquí in the 24 hours to 10:04 pm AST (02:04 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 1.7 earthquake was recorded in Coquí, PR, at 5:37 am AST on 2 December 2018 (09:37 UTC), 15 km deep.

USGS: Puerto Rico region

52 km (32 mi) SSW of San Juan, PR · 35 km (22 mi) SSW of Caguas, PR

5:37 am AST, Dec 2, 2018 · · 15 km deep · released about 9.6 lb of TNT

Every earthquake near Coquí Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Salinas Municipio 5 kmGuayama Municipio 9 kmCayey Municipio 17 kmSanta Isabel Municipio 18 kmArroyo Municipio 19 kmAibonito Municipio 19 kmCoamo Municipio 21 kmCidra Municipio 24 kmPatillas Municipio 25 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
5:37 am AST on 2 December 2018 ()
Where
in Coquí, PR · earthquakes near Coquí
Magnitude
M 1.7 (md)
Depth
15 km below the surface
Felt
no reports yet
Nearest
Salinas Municipio, 5 km WNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2902 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

At this magnitude and depth it was probably too small to be felt, even directly above it. 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: Central Aguirre, Jobos, Coco, Salinas, La Plena, Las Ochenta.

How big was it?

This earthquake released about 9.6 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.7 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,600,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,100,000× the energy of this one
  3. Around the size people start to feel M 3.0 99× the energy of this one
  4. This earthquake M 1.7 about 9.6 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 in our catalogue was M 4.6 on 2016-12-05 — about 25,000 times the energy of this one.

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 17.9628, -66.2188. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Salinas Municipio, PR 5 km (3 mi) WNW earthquakes near Salinas Municipio
Guayama Municipio, PR 9 km (5 mi) E earthquakes near Guayama Municipio
Cayey Municipio, PR 17 km (11 mi) NNE earthquakes near Cayey Municipio
Santa Isabel Municipio, PR 18 km (11 mi) W earthquakes near Santa Isabel Municipio
Arroyo Municipio, PR 19 km (12 mi) E earthquakes near Arroyo Municipio
Aibonito Municipio, PR 19 km (12 mi) NNW earthquakes near Aibonito Municipio

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

Aftershocks so far

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

  1. 1.9 2 km SW of Las Ollas, Puerto Rico
  2. 1.8 1 km NW of H. Rivera Colon, Puerto Rico
  3. 1.6 3 km SE of Santa Isabel, Puerto Rico
  4. 2.9 2 km ESE of H. Rivera Colon, Puerto Rico
  5. 2.3 4 km ESE of Ponce, Puerto Rico
  6. 2.0 Puerto Rico region
  7. 1.6 4 km SSW of Playita Cortada, Puerto Rico
  8. 1.9 3 km ESE of Ponce, Puerto Rico
  9. 1.7 8 km S of Emajagua, Puerto Rico
  10. 2.5 9 km SSW of Arroyo, Puerto Rico
  11. 2.6 2 km ENE of Corozal, Puerto Rico
  12. 1.7 5 km E of Comerío, Puerto Rico
  13. 1.7 1 km WNW of Ponce, Puerto Rico
  14. 1.8 2 km SSE of Santa Isabel, 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.