26 km S of Boca de Yuma, Dominican Republic

Yes. A magnitude 3.9 earthquake was recorded 26 km S of Boca de Yuma, Dominican Republic, at 5:51 am AST on 28 October 2026 (09:51 UTC), 83 km deep.

2026-10-28 09:51 UTC · 83 km deep · released about 9 tons of TNT

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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: 2026-10-28 09:51 UTC
Magnitude: M 3.9 (md)
Depth: 83 km below the surface
Felt: no reports yet
Nearest: Mayagüez Municipio, 75 km E
Status: Reviewed by a seismologist

USGS · last changed by USGS 14 days ago · we first saw it 14 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.

At this magnitude and depth, people at rest would likely notice it out to about 23 km (14 mi) from the epicentre. 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.

How big was it?

This earthquake released about 9 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.8 would have released about 32 times as much.

Northridge, California 1994 M 6.7 19,000× the energy of this one
Mineral, Virginia 2011 M 5.8 840× the energy of this one
Magna, Utah 2020 M 5.7 600× the energy of this one
This earthquake M 3.9 about 9 tons of TNT
Around the size people start to feel M 3.0 this one released 19× more

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 in our catalogue was M 5.7 on 2025-08-05 — about 600 times the energy of this one.

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

Map loads when it scrolls into view

Epicentre 18.1373, -68.5911. Map © OpenStreetMap contributors.

Nearby places

Place	Distance	Direction from the epicentre
Mayagüez Municipio, PR	75 km (46 mi)	E	earthquakes near Mayagüez Municipio

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

Aftershocks so far

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

3.4 11 km NE of Boca de Yuma, Dominican Republic 05:56 UTC
3.6 48 km SSW of Boca de Yuma, Dominican Republic 17:32 UTC
3.2 60 km ESE of Boca de Yuma, Dominican Republic 08:45 UTC

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of 13:02 UTC. QuakeIndex does not forecast aftershocks. When USGS issues an operational aftershock forecast it appears on the USGS event page.

On USGS

The official USGS event page — the source of record for every value above
Did you feel it? Report it to USGS — reports go to USGS, not to us
ShakeMap for this event, when USGS has produced one

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.