3.9

M3.9 Earthquake 26 km S of Boca de Yuma, Dominican Republic — October 28, 2026

2026-10-28 09:51:30 UTC (2 hours ago) · approx. 4:51 AM UTC-5 local

MagnitudeM3.9(md)
Time09:51 UTC≈ 4:51 AM UTC-5
Depth83.0 kmintermediate depth
Coordinates18.137°, -68.591°
Felt byNo felt reports
Status✓ Reviewed by USGS

On October 28, 2026 at 09:51 UTC, a magnitude 3.9 intermediate depth earthquake struck 26 km S of Boca de Yuma, Dominican Republic, at a depth of 83.0 km and coordinates 18.1373°, -68.5911°.

Physical scale: An earthquake of magnitude 3.9 releases seismic energy equivalent to roughly 9.0 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 273 m — a useful intuition for the size of the slip patch on the fault.

Map showing earthquake epicenter at 18.14°, -68.59°

Earthquake Details

Magnitude
3.9 md
Depth
83.0 km
intermediate depth
Location
18.1373°N
-68.5911°E

Technical Information

Event ID
pr2026301001
Event Type
earthquake
Status
✓ Reviewed
Significance
228
Stations Used
21
Azimuthal Gap
189.0°
Min Station Distance
0.431°
RMS Residual
0.62 sec
Last Updated
2026-10-28 11:07:28 UTC

Common Questions

How strong was the magnitude 3.9 earthquake near Boca de Yuma, Dominican Republic?

The magnitude 3.9 earthquake that struck 26 km S of Boca de Yuma, Dominican Republic on October 28, 2026 at 09:51 UTC had a depth of 83.0 km. For context, this was a minor earthquake typically detected only by instruments.

Were there aftershocks?

Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 3.9 earthquakes can continue for several days and gradually diminish over time.

Understanding This Data

Magnitude 3.9 earthquakes are typically only recorded by instruments.

Learn more about magnitude →

Authoritative source: USGS event page (event ID: pr2026301001). All scientific values on this page are sourced verbatim from the USGS feed.

Cite this page: EarthquakeTracker.org. (2026, October 28, 2026). M3.9 Earthquake 26 km S of Boca de Yuma, Dominican Republic — October 28, 2026. Retrieved October 28, 2026 from https://www.earthquaketracker.org/earthquakes/event/pr2026301001/