QuakeIndex

Earthquake · reviewed by a seismologist

M 2.3md

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 2.3 earthquake was recorded 6 km (4 mi) south-southeast of Jobos, PR, at 5:28 am AST on 27 October 2023 (09:28 UTC), 14 km deep.

USGS: 6 km SSE of Jobos, Puerto Rico

56 km (35 mi) S of San Juan, PR · 38 km (24 mi) SSW of Caguas, PR

5:28 am AST, Oct 27, 2023 · · 14 km deep · released about 91 lb of TNT

Every earthquake near Jobos Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Guayama Municipio 8 kmArroyo Municipio 13 kmSalinas Municipio 15 kmPatillas Municipio 20 kmCayey Municipio 22 kmSanta Isabel Municipio 27 kmMaunabo Municipio 28 kmAibonito Municipio 28 kmCidra Municipio 30 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
5:28 am AST on 27 October 2023 ()
Where
6 km (4 mi) south-southeast of Jobos, PR · earthquakes near Jobos
Magnitude
M 2.3 (md)
Depth
14 km below the surface
Felt
no reports yet
Nearest
Guayama Municipio, 8 km N
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1111 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 14 km (9 mi) from the epicentre. In Jobos, 6 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 9 km, intensity II. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 91 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.3 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 170,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 120,000× the energy of this one
  3. Around the size people start to feel M 3.0 10× the energy of this one
  4. This earthquake M 2.3 about 91 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 2,600 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 · 40 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 17.9030, -66.1408. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Guayama Municipio, PR 8 km (5 mi) N earthquakes near Guayama Municipio
Arroyo Municipio, PR 13 km (8 mi) NE earthquakes near Arroyo Municipio
Salinas Municipio, PR 15 km (9 mi) WNW earthquakes near Salinas Municipio
Patillas Municipio, PR 20 km (12 mi) ENE earthquakes near Patillas Municipio
Cayey Municipio, PR 22 km (14 mi) N earthquakes near Cayey Municipio
Santa Isabel Municipio, PR 27 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

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

  1. 2.4 2 km S of Salinas, Puerto Rico
  2. 2.9 5 km SSE of Salinas, Puerto Rico
  3. 2.2 3 km WSW of Central Aguirre, Puerto Rico
  4. 2.3 5 km SSE of Salinas, Puerto Rico
  5. 2.1 3 km SSE of Salinas, Puerto Rico
  6. 2.8 5 km NW of Orocovis, Puerto Rico
  7. 2.7 3 km NW of Orocovis, 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.