QuakeIndex

Earthquake · reviewed by a seismologist

M 3.2md

Earthquake near Jobos, PR

No earthquake was likely felt in Jobos in the 24 hours to 10:48 am AST (14:48 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 3.2 earthquake was recorded 8 km (5 mi) south-southeast of Jobos, PR, at 6:48 am AST on 27 October 2023 (10:48 UTC), 13 km deep.

USGS: 8 km SSE of Jobos, Puerto Rico

58 km (36 mi) S of San Juan, PR · 40 km (25 mi) SSW of Caguas, PR

6:48 am AST, Oct 27, 2023 · · 13 km deep · released about 1 tons of TNT

Every earthquake near Jobos Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Guayama Municipio 10 kmArroyo Municipio 14 kmSalinas Municipio 16 kmPatillas Municipio 20 kmCayey Municipio 24 kmSanta Isabel Municipio 28 kmMaunabo Municipio 28 kmAibonito Municipio 30 kmCidra Municipio 32 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
6:48 am AST on 27 October 2023 ()
Where
8 km (5 mi) south-southeast of Jobos, PR · earthquakes near Jobos
Magnitude
M 3.2 (md)
Depth
13 km below the surface
Felt
no reports yet
Nearest
Guayama Municipio, 10 km N
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1042 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, people at rest would likely notice it out to about 46 km (29 mi) from the epicentre. In Jobos, 8 km away, the estimate is intensity III (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 11 km, intensity III · Cayey 25 km, intensity II · Emajagua 30 km, intensity II · Santa Isabel 30 km, intensity II · Coamo 32 km, intensity II · Jagual 34 km, intensity II · Sumidero 37 km, intensity II · Río Cañas Abajo 39 km, intensity II. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 1 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.2 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 170,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 7,400× the energy of this one
  3. Magna, Utah 2020 M 5.7 5,200× the energy of this one
  4. This earthquake M 3.2 about 1 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 2.1× more

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 120 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 · 41 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 17.8882, -66.1360. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Guayama Municipio, PR 10 km (6 mi) N earthquakes near Guayama Municipio
Arroyo Municipio, PR 14 km (8 mi) NE earthquakes near Arroyo Municipio
Salinas Municipio, PR 16 km (10 mi) NW earthquakes near Salinas Municipio
Patillas Municipio, PR 20 km (13 mi) NE earthquakes near Patillas Municipio
Cayey Municipio, PR 24 km (15 mi) N earthquakes near Cayey Municipio
Santa Isabel Municipio, PR 28 km (17 mi) WNW earthquakes near Santa Isabel Municipio

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

Aftershocks so far

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

  1. 2.1 4 km SSE of Salinas, Puerto Rico
  2. 2.7 6 km SSE of Salinas, Puerto Rico
  3. 2.4 2 km S of Salinas, Puerto Rico
  4. 2.9 5 km SSE of Salinas, Puerto Rico
  5. 2.2 3 km WSW of Central Aguirre, Puerto Rico
  6. 2.3 5 km SSE of Salinas, Puerto Rico
  7. 2.1 3 km SSE of Salinas, Puerto Rico
  8. 2.1 4 km ENE of Bayamon, Puerto Rico
  9. 2.2 5 km SSW of Arroyo, Puerto Rico
  10. 2.4 4 km ENE of Bayamon, Puerto Rico
  11. 2.5 7 km ESE of Naranjito, Puerto Rico
  12. 2.2 5 km SSE of Salinas, Puerto Rico
  13. 2.4 6 km SSE of Salinas, Puerto Rico
  14. 2.6 6 km SSE of Salinas, Puerto Rico
  15. 2.5 Puerto Rico region

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.