QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1md

Earthquake near Adjuntas, PR

No earthquake was likely felt in Adjuntas in the 24 hours to 12:52 pm AST (16:52 UTC). The last one was M 3.0, 31 km (19 mi) SSW, at 3:45 am AST on 8 November 2026, estimated intensity II (weak) in town. Every earthquake near Adjuntas

This page: a magnitude 2.1 earthquake was recorded 12 km (7 mi) west of Adjuntas, PR, at 7:18 pm AST on 14 September 2026 (23:18 UTC), 7.3 km deep.

USGS: 11 km W of Adjuntas, Puerto Rico

27 km (17 mi) NW of Ponce, PR

7:18 pm AST, Sep 14, 2026 · · 7.3 km deep · released about 47 lb of TNT

Every earthquake near Adjuntas Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Yauco Municipio 7 kmAdjuntas Municipio 9 kmMaricao Municipio 12 kmSabana Grande Municipio 14 kmLares Municipio 16 kmGuayanilla Municipio 16 kmPeñuelas Municipio 17 kmLas Marías Municipio 18 kmUtuado Municipio 20 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
7:18 pm AST on 14 September 2026 ()
Where
12 km (7 mi) west of Adjuntas, PR · earthquakes near Adjuntas
Magnitude
M 2.1 (md)
Depth
7.3 km below the surface
Felt
no reports yet
Nearest
Yauco Municipio, 7 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 58 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 16 km (10 mi) from the epicentre. In Adjuntas, 12 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: Adjuntas 12 km, intensity II · Yauco 12 km, intensity II · Guayanilla 14 km, intensity II · Magas Arriba 15 km, intensity II. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 47 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.1 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 320,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 230,000× the energy of this one
  3. Around the size people start to feel M 3.0 20× the energy of this one
  4. This earthquake M 2.1 about 47 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 6.4 on 2020-01-07 — about 2,500,000 times the energy of this one.

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

  1. 5.8 4 km E of Moca, Puerto Rico · 38 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 18.1422, -66.8307. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Yauco Municipio, PR 7 km (4 mi) SSW earthquakes near Yauco Municipio
Adjuntas Municipio, PR 9 km (5 mi) ENE earthquakes near Adjuntas Municipio
Maricao Municipio, PR 12 km (7 mi) WNW earthquakes near Maricao Municipio
Sabana Grande Municipio, PR 14 km (9 mi) WSW earthquakes near Sabana Grande Municipio
Lares Municipio, PR 16 km (10 mi) NNW earthquakes near Lares Municipio
Guayanilla Municipio, PR 16 km (10 mi) SSE earthquakes near Guayanilla Municipio

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

Aftershocks so far

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

  1. 1.5 4 km WSW of Fuig, Puerto Rico
  2. 2.2 4 km SW of Fuig, Puerto Rico
  3. 2.7 6 km WSW of Guánica, Puerto Rico
  4. 2.6 4 km WSW of Fuig, Puerto Rico
  5. 1.6 5 km WSW of Guánica, Puerto Rico
  6. 2.1 4 km WSW of Guánica, Puerto Rico
  7. 1.6 4 km SSW of Liborio Negron Torres, Puerto Rico
  8. 1.5 4 km WSW of Guánica, Puerto Rico
  9. 2.4 4 km S of Liborio Negron Torres, Puerto Rico
  10. 1.5 3 km SW of Guánica, Puerto Rico
  11. 1.7 4 km W of Fuig, Puerto Rico
  12. 1.7 3 km WSW of Fuig, Puerto Rico
  13. 2.2 3 km NW of Fuig, Puerto Rico
  14. 1.9 2 km S of Liborio Negron Torres, Puerto Rico
  15. 2.3 4 km SSW of Guánica, 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.