QuakeIndex

Earthquake · reviewed by a seismologist

M 2.5md

Earthquake near Jobos, PR

No earthquake was likely felt in Jobos in the 24 hours to 11:08 pm AST (03:08 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 2.5 earthquake was recorded 18 km (11 mi) south-southeast of Jobos, PR, at 7:19 am AST on 14 September 2018 (11:19 UTC), 36 km deep.

USGS: 17 km SSE of Jobos, Puerto Rico

67 km (42 mi) S of San Juan, PR · 49 km (30 mi) SSW of Caguas, PR

7:19 am AST, Sep 14, 2018 · · 36 km deep · released about 160 lb of TNT

Every earthquake near Jobos Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Guayama Municipio 19 kmArroyo Municipio 21 kmSalinas Municipio 24 kmPatillas Municipio 27 kmSanta Isabel Municipio 32 kmMaunabo Municipio 33 kmCayey Municipio 34 kmAibonito Municipio 39 kmYabucoa Municipio 41 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
7:19 am AST on 14 September 2018 ()
Where
18 km (11 mi) south-southeast of Jobos, PR · earthquakes near Jobos
Magnitude
M 2.5 (md)
Depth
36 km below the surface
Felt
no reports yet
Nearest
Guayama Municipio, 19 km N
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2980 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 Jobos, 18 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.

Earthquakes near other towns within 30 km: Central Aguirre, Arroyo, Guayama, Corazón, Coquí, Olimpo.

How big was it?

This earthquake released about 160 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 92,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 65,000× the energy of this one
  3. Around the size people start to feel M 3.0 5.8× the energy of this one
  4. This earthquake M 2.5 about 160 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 1,500 times the energy of this one.

Before 2016, the USGS record since 1900 lists no earthquake of M5 or more within 50 km.

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 17.8008, -66.1291. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Guayama Municipio, PR 19 km (12 mi) N earthquakes near Guayama Municipio
Arroyo Municipio, PR 21 km (13 mi) NNE earthquakes near Arroyo Municipio
Salinas Municipio, PR 24 km (15 mi) NW earthquakes near Salinas Municipio
Patillas Municipio, PR 27 km (17 mi) NE earthquakes near Patillas Municipio
Santa Isabel Municipio, PR 32 km (20 mi) WNW earthquakes near Santa Isabel Municipio
Maunabo Municipio, PR 33 km (21 mi) NE earthquakes near Maunabo 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. 1.7 8 km S of Emajagua, Puerto Rico
  2. 2.5 9 km SSW of Arroyo, Puerto Rico
  3. 1.7 5 km E of Comerío, Puerto Rico
  4. 1.8 2 km SSE of Santa Isabel, Puerto Rico
  5. 1.7 Puerto Rico region
  6. 2.0 5 km S of Salinas, Puerto Rico
  7. 2.5 4 km SW of Patillas, Puerto Rico
  8. 1.9 11 km S of Emajagua, Puerto Rico
  9. 2.6 Puerto Rico region
  10. 2.0 7 km SE of Arroyo, Puerto Rico
  11. 2.1 4 km ESE of Palmarejo, Puerto Rico
  12. 2.0 Puerto Rico region
  13. 2.0 3 km SSW of Jauca, Puerto Rico
  14. 2.3 2 km SSW of Jauca, Puerto Rico
  15. 2.0 2 km SSW of Jauca, 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.