QuakeIndex

Earthquake · reviewed by a seismologist

M 2.2md

Earthquake near H. Rivera Colon, PR

No earthquake was likely felt in H. Rivera Colon in the 24 hours to 8:02 pm AST (00:02 UTC). The last one was M 4.8, 84 km (52 mi) WSW, at 9:19 am AST on 18 September 2026, estimated intensity III (weak) in town; 86 felt reports to USGS. Every earthquake near H. Rivera Colon

This page: a magnitude 2.2 earthquake was recorded in H. Rivera Colon, PR, at 9:15 pm AST on 8 April 2021 (01:15 UTC), 18 km deep. 1 person has reported feeling it to USGS.

USGS: 1 km SW of H. Rivera Colon, Puerto Rico

25 km (15 mi) WSW of San Juan, PR · 14 km (9 mi) WSW of Bayamón, PR

9:15 pm AST, Apr 8, 2021 · · 18 km deep · released about 54 lb of TNT

Every earthquake near H. Rivera Colon Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Corozal Municipio 5 kmToa Alta Municipio 6 kmNaranjito Municipio 6 kmVega Alta Municipio 12 kmBayamón Municipio 13 kmMorovis Municipio 14 kmComerío Municipio 14 kmBarranquitas Municipio 15 kmDorado Municipio 16 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
9:15 pm AST on 8 April 2021 ()
Where
in H. Rivera Colon, PR · earthquakes near H. Rivera Colon
Magnitude
M 2.2 (md)
Depth
18 km below the surface
Felt
1 report · strongest reported intensity III
Nearest
Corozal Municipio, 5 km SW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1556 days ago

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

At this magnitude and depth, people at rest would likely notice it out to about 2 km (1 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.

Earthquakes near other towns within 30 km: Corozal, Galateo, Naranjito, Río Lajas, Toa Alta, San José.

How big was it?

This earthquake released about 54 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.2 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 280,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 200,000× the energy of this one
  3. Around the size people start to feel M 3.0 18× the energy of this one
  4. This earthquake M 2.2 about 54 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 4.6 on 2019-03-12 — about 4,400 times the energy of this one.

Before 2016, the USGS record lists 3 earthquakes of M5 or more within 50 km:

  1. 5.8 12 km N of Garrochales, Puerto Rico · 39 km NW of this epicentre
  2. 5.1 3 km W of Aguas Buenas, Puerto Rico · 18 km ESE of this epicentre
  3. 5.0 3 km N of Brenas, Puerto Rico · 19 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 18.3360, -66.2876. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Corozal Municipio, PR 5 km (3 mi) SW earthquakes near Corozal Municipio
Toa Alta Municipio, PR 6 km (3 mi) NE earthquakes near Toa Alta Municipio
Naranjito Municipio, PR 6 km (4 mi) SE earthquakes near Naranjito Municipio
Vega Alta Municipio, PR 12 km (8 mi) NNW earthquakes near Vega Alta Municipio
Bayamón Municipio, PR 13 km (8 mi) E earthquakes near Bayamón Municipio
Morovis Municipio, PR 14 km (9 mi) W earthquakes near Morovis Municipio

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

Aftershocks so far

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

  1. 3.0 1 km NNE of Potala Pastillo, Puerto Rico
  2. 2.8 5 km ESE of Ponce, Puerto Rico
  3. 2.0 4 km SSE of G. L. Garcia, 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.