3.3

M3.3 Earthquake 17 km NNE of Maeser, UtahDecember 2, 2025

2025-12-02 22:20:36 UTC (2025-12-02) · approx. 3:20 PM UTC-7 local

MagnitudeM3.3(ml)
Time22:20 UTC3:20 PM UTC-7
Depth0.0 kmshallow crustal
Coordinates40.612°, -109.472°
Felt byNo felt reports
Status✓ Reviewed by USGS

On December 2, 2025 at 22:20 UTC, a magnitude 3.3 shallow crustal earthquake struck 17 km NNE of Maeser, Utah, at a depth of 0.0 km and coordinates 40.6117°, -109.4725°.

Physical scale: An earthquake of magnitude 3.3 releases seismic energy equivalent to roughly 1.3 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 114 m — a useful intuition for the size of the slip patch on the fault.

Map showing earthquake epicenter at 40.61°, -109.47°

Earthquake Details

Magnitude
3.3 ml
Depth
0.0 km
shallow crustal
Location
40.6117°N
-109.4725°E

Technical Information

Event ID
us6000rs36
Event Type
mining explosion
Status
✓ Reviewed
Significance
168
Stations Used
21
Azimuthal Gap
118.0°
Min Station Distance
0.084°
RMS Residual
0.57 sec
Last Updated
2026-02-25 16:18:43 UTC

Common Questions

How strong was the magnitude 3.3 earthquake near Maeser, Utah?

The magnitude 3.3 earthquake that struck 17 km NNE of Maeser, Utah on December 2, 2025 at 22:20 UTC had a depth of 0.0 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 3.3 earthquakes can continue for several days and gradually diminish over time.

What should I do after an earthquake?

If you were in the affected area: check yourself and others for injuries, inspect your home for damage, and be prepared for aftershocks. For detailed guidance, see our earthquake safety guide and emergency planning resources.

Authoritative source: USGS event page (event ID: us6000rs36). All scientific values on this page are sourced verbatim from the USGS feed.

Cite this page: EarthquakeTracker.org. (2025, December 2, 2025). M3.3 Earthquake 17 km NNE of Maeser, UtahDecember 2, 2025. Retrieved May 24, 2026 from https://www.earthquaketracker.org/earthquakes/event/us6000rs36/