QuakeIndex

Earthquake · reviewed by a seismologist

M 1.9md

Earthquake near Jobos, PR

No earthquake was likely felt in Jobos in the 24 hours to 10:12 am AST (14:12 UTC). The last one was M 3.0, 28 km (18 mi) WSW, at 7:09 pm AST on 5 November 2026, estimated intensity II (weak) in town. Every earthquake near Jobos

This page: a magnitude 1.9 earthquake was recorded 4 km (3 mi) north of Jobos, PR, at 5:37 am AST on 4 April 2019 (09:37 UTC), 14 km deep.

USGS: 4 km N of Jobos, Puerto Rico

47 km (29 mi) SSW of San Juan, PR · 29 km (18 mi) SSW of Caguas, PR

5:37 am AST, Apr 4, 2019 · · 14 km deep · released about 23 lb of TNT

Every earthquake near Jobos Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Guayama Municipio 3 kmSalinas Municipio 11 kmCayey Municipio 12 kmArroyo Municipio 13 kmPatillas Municipio 18 kmAibonito Municipio 19 kmCidra Municipio 20 kmCoamo Municipio 24 kmSanta Isabel Municipio 25 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
5:37 am AST on 4 April 2019 ()
Where
4 km (3 mi) north of Jobos, PR · earthquakes near Jobos
Magnitude
M 1.9 (md)
Depth
14 km below the surface
Felt
no reports yet
Nearest
Guayama Municipio, 3 km SE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2778 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 5 km (3 mi) from the epicentre. In Jobos, 4 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: Guayama 5 km, intensity II. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 23 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 660,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 470,000× the energy of this one
  3. Around the size people start to feel M 3.0 42× the energy of this one
  4. This earthquake M 1.9 about 23 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 10,000 times the energy of this one.

Before 2016, the USGS record lists one earthquake of M5 or more within 50 km:

  1. 5.1 3 km W of Aguas Buenas, Puerto Rico · 30 km N 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 17.9946, -66.1580. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Guayama Municipio, PR 3 km (2 mi) SE earthquakes near Guayama Municipio
Salinas Municipio, PR 11 km (7 mi) WSW earthquakes near Salinas Municipio
Cayey Municipio, PR 12 km (8 mi) N earthquakes near Cayey Municipio
Arroyo Municipio, PR 13 km (8 mi) ESE earthquakes near Arroyo Municipio
Patillas Municipio, PR 18 km (11 mi) E earthquakes near Patillas Municipio
Aibonito Municipio, PR 19 km (12 mi) NW earthquakes near Aibonito 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 0 km E of Río Lajas, Puerto Rico
  2. 1.5 3 km NE of Río Cañas Abajo, Puerto Rico
  3. 1.8 6 km ESE of Jayuya, Puerto Rico
  4. 1.9 6 km NW of Villalba, Puerto Rico
  5. 1.6 2 km WSW of Jauca, Puerto Rico
  6. 1.9 9 km ENE of Jayuya, Puerto Rico
  7. 2.3 5 km ESE of Emajagua, Puerto Rico
  8. 2.8 12 km SSE of Punta Santiago, Puerto Rico
  9. 2.5 15 km S of Potala Pastillo, Puerto Rico
  10. 2.7 1 km E of Guaynabo, Puerto Rico
  11. 1.9 5 km SSE of Arroyo, Puerto Rico
  12. 1.5 1 km S of Jauca, Puerto Rico
  13. 1.5 2 km NNE of San Lorenzo, Puerto Rico
  14. 1.7 3 km NNE of Río Cañas Abajo, Puerto Rico
  15. 2.6 6 km ESE of Pájaros, 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.