QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1md

Earthquake near Maria Antonia, PR

Yes. A magnitude 2.1 earthquake was recorded 6 km (4 mi) southeast of Maria Antonia, PR, at 6:08 am AST on 18 October 2026 (10:08 UTC), 14 km deep. No felt reports to USGS yet.

USGS: 5 km SE of Maria Antonia, Puerto Rico

25 km (15 mi) WSW of Ponce, PR

6:08 am AST, Oct 18, 2026 · · 14 km deep · released about 37 lb of TNT

Every earthquake near Maria Antonia Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Guánica Municipio 8 kmGuayanilla Municipio 9 kmPeñuelas Municipio 16 kmYauco Municipio 16 kmSabana Grande Municipio 19 kmLajas Municipio 21 kmPonce Municipio 26 kmSan Germán Municipio 27 kmMaricao Municipio 27 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
6:08 am AST on 18 October 2026 ()
Where
6 km (4 mi) southeast of Maria Antonia, PR · earthquakes near Maria Antonia
Magnitude
M 2.1 (md)
Depth
14 km below the surface
Felt
no reports yet
Nearest
Guánica Municipio, 8 km W
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 14 hours 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 9 km (6 mi) from the epicentre. In Maria Antonia, 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: Maria Antonia 6 km, intensity II · Indios 6 km, intensity II · Guánica 7 km, intensity II · Palomas 8 km, intensity II · Fuig 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 37 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 5.8 410,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 290,000× the energy of this one
  3. Around the size people start to feel M 3.0 26× the energy of this one
  4. This earthquake M 2.1 about 37 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 3,200,000 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 17.9433, -66.8477. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Guánica Municipio, PR 8 km (5 mi) W earthquakes near Guánica Municipio
Guayanilla Municipio, PR 9 km (5 mi) NE earthquakes near Guayanilla Municipio
Peñuelas Municipio, PR 16 km (10 mi) NE earthquakes near Peñuelas Municipio
Yauco Municipio, PR 16 km (10 mi) N earthquakes near Yauco Municipio
Sabana Grande Municipio, PR 19 km (12 mi) NW earthquakes near Sabana Grande Municipio
Lajas Municipio, PR 21 km (13 mi) W earthquakes near Lajas Municipio

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

Aftershocks so far

1 earthquake has been recorded within 50 km since this one.

  1. 2.2 6 km SSE of Ponce, 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.