QuakeIndex

Earthquake · reviewed by a seismologist

M 1.6md

Earthquake near Jagual, PR

No earthquake was likely felt in Jagual in the 24 hours to 5:59 pm AST (21:59 UTC). The last one was M 4.1, 73 km (45 mi) ESE, at 5:44 am AST on 28 October 2026, estimated intensity II (weak) in town; 5 felt reports to USGS. Every earthquake near Jagual

This page: a magnitude 1.6 earthquake was recorded 3 km (2 mi) north-northwest of Jagual, PR, at 8:43 pm AST on 3 October 2019 (00:43 UTC), 33 km deep.

USGS: 2 km NNW of Jagual, Puerto Rico

6 km (4 mi) SSE of Caguas, PR

8:43 pm AST, Oct 3, 2019 · · 33 km deep · released about 7.6 lb of TNT

Every earthquake near Jagual Felt it? Tell USGS Check my area
10 km30 km60 km120 km N San Lorenzo Municipio 5 kmCaguas Municipio 5 kmGurabo Municipio 10 kmJuncos Municipio 11 kmLas Piedras Municipio 14 kmAguas Buenas Municipio 15 kmCidra Municipio 16 kmTrujillo Alto Municipio 17 kmCayey Municipio 18 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
8:43 pm AST on 3 October 2019 ()
Where
3 km (2 mi) north-northwest of Jagual, PR · earthquakes near Jagual
Magnitude
M 1.6 (md)
Depth
33 km below the surface
Felt
no reports yet
Nearest
San Lorenzo Municipio, 5 km SE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2596 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. In Jagual, 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: San Lorenzo, Caguas, Gurabo, Bairoa, Juncos, Celada.

How big was it?

This earthquake released about 7.6 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.6 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 2,000,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,400,000× the energy of this one
  3. Around the size people start to feel M 3.0 130× the energy of this one
  4. This earthquake M 1.6 about 7.6 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 since 2016 was M 4.6 on 2016-12-05 — about 32,000 times the energy of this one.

Before 2016, the USGS record lists 2 earthquakes of M5 or more within 50 km:

  1. 5.1 3 km W of Aguas Buenas, Puerto Rico · 16 km WNW of this epicentre
  2. 5.0 3 km N of Brenas, Puerto Rico · 50 km NW 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 18.1843, -66.0075. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
San Lorenzo Municipio, PR 5 km (3 mi) SE earthquakes near San Lorenzo Municipio
Caguas Municipio, PR 5 km (3 mi) WNW earthquakes near Caguas Municipio
Gurabo Municipio, PR 10 km (6 mi) NNE earthquakes near Gurabo Municipio
Juncos Municipio, PR 11 km (7 mi) ENE earthquakes near Juncos Municipio
Las Piedras Municipio, PR 14 km (9 mi) E earthquakes near Las Piedras Municipio
Aguas Buenas Municipio, PR 15 km (9 mi) WNW earthquakes near Aguas Buenas Municipio

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

Aftershocks so far

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

  1. 2.4 3 km WSW of Central Aguirre, Puerto Rico
  2. 2.6 2 km SSW of Parcelas Peñuelas, Puerto Rico
  3. 2.1 10 km S of Salinas, Puerto Rico
  4. 3.0 4 km SSW of Bayamón, Puerto Rico
  5. 1.8 2 km SE of Jauca, Puerto Rico
  6. 2.9 2 km NE of Guaynabo, Puerto Rico
  7. 2.7 4 km SE of Jauca, Puerto Rico
  8. 1.9 2 km E of Jauca, Puerto Rico
  9. 1.9 2 km ESE of Jauca, Puerto Rico
  10. 1.7 6 km SSE of Jauca, Puerto Rico
  11. 2.3 4 km SE of Jauca, Puerto Rico
  12. 1.6 6 km SSW of Jagual, Puerto Rico
  13. 2.1 4 km SSE of Salinas, Puerto Rico
  14. 2.2 2 km SSE of Salinas, Puerto Rico
  15. 1.9 2 km SSW of Las Ochenta, 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.