QuakeIndex

Earthquake · reviewed by a seismologist

M 2.7md

Earthquake near H. Rivera Colon, PR

No earthquake was likely felt in H. Rivera Colon in the 24 hours to 6:02 pm AST (22:02 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 2.7 earthquake was recorded 3 km (2 mi) southwest of H. Rivera Colon, PR, at 11:14 am AST on 20 January 2019 (15:14 UTC), 118 km deep.

USGS: 2 km SW of H. Rivera Colon, Puerto Rico

25 km (16 mi) WSW of San Juan, PR · 15 km (9 mi) WSW of Bayamón, PR

11:14 am AST, Jan 20, 2019 · · 118 km deep · released about 310 lb of TNT

10 km30 km60 km120 km N Corozal Municipio 5 kmNaranjito Municipio 6 kmToa Alta Municipio 6 kmVega Alta Municipio 13 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
11:14 am AST on 20 January 2019 ()
Where
3 km (2 mi) southwest of H. Rivera Colon, PR · earthquakes near H. Rivera Colon
Magnitude
M 2.7 (md)
Depth
118 km below the surface
Felt
no reports yet
Nearest
Corozal Municipio, 5 km SW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2852 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 H. Rivera Colon, 3 km away, the estimate is intensity I (not felt). 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 310 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.7 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 50,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 35,000× the energy of this one
  3. Around the size people start to feel M 3.0 3.1× the energy of this one
  4. This earthquake M 2.7 about 310 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

No earthquake of M4 or more has been recorded within 50 km since our catalogue begins in 2016.

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 · 20 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 18.3316, -66.2921. Map © OpenStreetMap contributors.

Nearby places

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

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

Aftershocks so far

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

  1. 2.9 3 km N of Naranjito, Puerto Rico
  2. 1.6 1 km ESE of Los Llanos, Puerto Rico
  3. 1.9 1 km W of Jauca, Puerto Rico
  4. 1.6 1 km NNW of Jayuya, Puerto Rico
  5. 1.9 4 km N of Palmarejo, Puerto Rico
  6. 1.9 1 km ENE of El Ojo, Puerto Rico
  7. 2.2 26 km N of Dorado, Puerto Rico
  8. 2.5 31 km N of Brenas, Puerto Rico
  9. 2.0 0 km SSE of Playita Cortada, Puerto Rico
  10. 2.3 4 km NW of Palomas, Puerto Rico
  11. 2.3 Puerto Rico region
  12. 2.3 6 km NE of Villalba, Puerto Rico
  13. 1.9 24 km NNE of Tierras Nuevas Poniente, Puerto Rico
  14. 2.6 8 km NNW of Tierras Nuevas Poniente, Puerto Rico
  15. 2.5 1 km ESE 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.