QuakeIndex

Earthquake · reviewed by a seismologist

M 2.9md

Earthquake near Río Lajas, PR

No earthquake was likely felt in Río Lajas in the 24 hours to 5:19 am AST (09:19 UTC). The last one was M 4.8, 88 km (55 mi) SW, at 9:19 am AST on 18 September 2026, estimated intensity III (weak) in town; 86 felt reports to USGS. Every earthquake near Río Lajas

This page: a magnitude 2.9 earthquake was recorded in Río Lajas, PR, at 4:03 pm AST on 19 June 2022 (20:03 UTC), 59 km deep. 1 person has reported feeling it to USGS.

USGS: 1 km WNW of Río Lajas, Puerto Rico

23 km (14 mi) W of San Juan, PR · 12 km (8 mi) W of Bayamón, PR

4:03 pm AST, Jun 19, 2022 · · 59 km deep · released about 610 lb of TNT

Every earthquake near Río Lajas Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Toa Alta Municipio 5 kmVega Alta Municipio 7 kmDorado Municipio 9 kmToa Baja Municipio 11 kmCorozal Municipio 12 kmNaranjito Municipio 12 kmBayamón Municipio 13 kmVega Baja Municipio 14 kmCataño Municipio 15 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
4:03 pm AST on 19 June 2022 ()
Where
in Río Lajas, PR · earthquakes near Río Lajas
Magnitude
M 2.9 (md)
Depth
59 km below the surface
Felt
1 report · strongest reported intensity II
Nearest
Toa Alta Municipio, 5 km SE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1555 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. 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: San José, Toa Alta, Galateo, Campanilla, Toa Baja, H. Rivera Colon.

How big was it?

This earthquake released about 610 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 25,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 18,000× the energy of this one
  3. Around the size people start to feel M 3.0 1.6× the energy of this one
  4. This earthquake M 2.9 about 610 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 4.4 on 2018-12-09 — about 200 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 · 35 km WNW of this epicentre
  2. 5.1 3 km W of Aguas Buenas, Puerto Rico · 22 km SE of this epicentre
  3. 5.0 3 km N of Brenas, Puerto Rico · 13 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 18.3985, -66.2777. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Toa Alta Municipio, PR 5 km (3 mi) SE earthquakes near Toa Alta Municipio
Vega Alta Municipio, PR 7 km (5 mi) NW earthquakes near Vega Alta Municipio
Dorado Municipio, PR 9 km (5 mi) N earthquakes near Dorado Municipio
Toa Baja Municipio, PR 11 km (7 mi) NE earthquakes near Toa Baja Municipio
Corozal Municipio, PR 12 km (7 mi) SSW earthquakes near Corozal Municipio
Naranjito Municipio, PR 12 km (8 mi) SSE earthquakes near Naranjito Municipio

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

Aftershocks so far

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

  1. 3.3 1 km SE of Toa Baja, Puerto Rico
  2. 2.7 4 km ENE of Tierras Nuevas Poniente, Puerto Rico
  3. 2.1 8 km N of Arecibo, Puerto Rico
  4. 3.1 32 km N of San Juan, Puerto Rico
  5. 2.6 4 km E of Palmarejo, Puerto Rico
  6. 3.1 5 km SSE of Pájaros, Puerto Rico
  7. 2.8 7 km NNW of San Juan, Puerto Rico
  8. 2.2 0 km N of Salinas, Puerto Rico
  9. 2.6 3 km NNW of Coamo, 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.