QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1md

Earthquake near Guánica, PR

USGS: 24 km S of Guánica, Puerto Rico

43 km (27 mi) SW of Ponce, PR

5:27 pm AST, Oct 1, 2026 · · 6.0 km deep · released about 43 lb of TNT

Every earthquake near Guánica Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Guánica Municipio 22 kmLajas Municipio 27 kmGuayanilla Municipio 32 kmSabana Grande Municipio 37 kmCabo Rojo Municipio 37 kmPeñuelas Municipio 38 kmYauco Municipio 38 kmSan Germán Municipio 41 kmPonce Municipio 45 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
5:27 pm AST on 1 October 2026 ()
Where
25 km (15 mi) S of Guánica, PR · earthquakes near Guánica
Magnitude
M 2.1 (md)
Depth
6.0 km below the surface
Felt
no reports yet
Nearest
Guánica Municipio, 22 km N
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 27 hours ago

A magnitude 2.1 earthquake was recorded 25 km (15 mi) S of Guánica, PR, at 5:27 pm AST on 1 October 2026 (21:27 UTC). This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

Earthquakes near other towns within 30 km: Maria Antonia, Fuig, La Parguera, Indios, Palomas.

How big was it?

This earthquake released about 43 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 5.8 350,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 250,000× the energy of this one
  3. Around the size people start to feel M 3.0 22× the energy of this one
  4. This earthquake M 2.1 about 43 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 2,800,000 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 17.7522, -66.9392. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Guánica Municipio, PR 22 km (14 mi) N earthquakes near Guánica Municipio
Lajas Municipio, PR 27 km (17 mi) NNW earthquakes near Lajas Municipio
Guayanilla Municipio, PR 32 km (20 mi) NNE earthquakes near Guayanilla Municipio
Sabana Grande Municipio, PR 37 km (23 mi) N earthquakes near Sabana Grande Municipio
Cabo Rojo Municipio, PR 37 km (23 mi) NW earthquakes near Cabo Rojo Municipio
Peñuelas Municipio, PR 38 km (23 mi) NE earthquakes near Peñuelas Municipio

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

Aftershocks so far

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

  1. 2.2 0 km SSW of Maria Antonia, Puerto Rico
  2. 2.3 5 km WSW 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.