QuakeIndex

Earthquake · reviewed by a seismologist

M 2.5md

Earthquake near Coco, PR

No earthquake was likely felt in Coco in the 24 hours to 4:31 am AST (08:31 UTC). The last one was M 2.2, 10 km (6 mi) WNW, at 5:05 pm AST on 8 November 2026, estimated intensity II (weak) in town. Every earthquake near Coco

This page: a magnitude 2.5 earthquake was recorded 3 km (2 mi) east-northeast of Coco, PR, at 10:32 am AST on 9 December 2020 (14:32 UTC), 15 km deep.

USGS: Puerto Rico region

46 km (29 mi) SSW of San Juan, PR · 31 km (19 mi) SW of Caguas, PR

10:32 am AST, Dec 9, 2020 · · 15 km deep · released about 190 lb of TNT

Every earthquake near Coco Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Salinas Municipio 6 kmGuayama Municipio 11 kmCayey Municipio 13 kmAibonito Municipio 13 kmCoamo Municipio 16 kmSanta Isabel Municipio 18 kmCidra Municipio 19 kmArroyo Municipio 21 kmBarranquitas Municipio 22 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
10:32 am AST on 9 December 2020 ()
Where
3 km (2 mi) east-northeast of Coco, PR · earthquakes near Coco
Magnitude
M 2.5 (md)
Depth
15 km below the surface
Felt
no reports yet
Nearest
Salinas Municipio, 6 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2165 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 17 km (11 mi) from the epicentre. In Coco, 3 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.

Likely felt in: Cayey 12 km, intensity II · Guayama 13 km, intensity II · Coamo 15 km, intensity II. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 190 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 78,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 55,000× the energy of this one
  3. Around the size people start to feel M 3.0 4.9× the energy of this one
  4. This earthquake M 2.5 about 190 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 5.0 on 2020-01-07 — about 4,900 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 18.0193, -66.2308. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Salinas Municipio, PR 6 km (4 mi) SSW earthquakes near Salinas Municipio
Guayama Municipio, PR 11 km (7 mi) ESE earthquakes near Guayama Municipio
Cayey Municipio, PR 13 km (8 mi) NE earthquakes near Cayey Municipio
Aibonito Municipio, PR 13 km (8 mi) NNW earthquakes near Aibonito Municipio
Coamo Municipio, PR 16 km (10 mi) NW earthquakes near Coamo Municipio
Santa Isabel Municipio, PR 18 km (11 mi) WSW earthquakes near Santa Isabel Municipio

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

Aftershocks so far

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

  1. 3.0 Puerto Rico region
  2. 1.9 0 km W of Parcelas Peñuelas, Puerto Rico
  3. 1.8 3 km E of El Negro, Puerto Rico
  4. 3.1 0 km SE of San Antonio, Puerto Rico
  5. 2.4 2 km S of Guaynabo, Puerto Rico
  6. 1.8 1 km ESE of Potala Pastillo, Puerto Rico
  7. 3.3 5 km SE of Pájaros, Puerto Rico
  8. 2.3 2 km N of Jagual, Puerto Rico
  9. 2.0 0 km E of Potala Pastillo, Puerto Rico
  10. 2.4 3 km NNE of Potala Pastillo, Puerto Rico
  11. 3.3 0 km NE of Potala Pastillo, Puerto Rico
  12. 3.1 2 km NE 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.

On USGS

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