Magnitude 4.0 Earthquake at Depth 14 km Strikes Utah on 7th August 2026

A magnitude 4.0 earthquake struck southern Utah on 7th August 2026 at 23:54 UTC, with the epicentre located 11 km south of Teasdale, Utah. According to the USGS, the quake occurred at a depth of 13.5 km, classifying it as a shallow earthquake, which typically produces more noticeable surface shaking.

Location and Event Details

The earthquake was centred at 38.180°N, 111.480°W, within Wayne County, an area known for frequent low‑magnitude seismic activity. The event was automatically recorded by the University of Utah Seismograph Stations, which monitor seismicity across the region.

Shaking and Public Reports

Although a magnitude 4.0 quake is considered minor, it can still be felt by residents close to the epicentre. USGS received 15 felt reports, with shaking intensities ranging from III (weak) to IV (light) on the Modified Mercalli Intensity scale. These reports help refine shaking maps and improve seismic hazard assessments.

Regional Seismic Context

Utah experiences around 700 earthquakes per year, though only a small percentage are felt by the public. Minor earthquakes like this one are common in central and southern Utah, where fault systems associated with the Basin and Range Province generate regular seismic activity.

Tsunami Risk

No tsunami threat was associated with this event, as expected for an inland earthquake far from any ocean basin.

Safety Reminder

Residents in affected areas are advised to follow standard earthquake safety guidance:

• Drop, Cover, and Hold On during shaking
• Stay clear of buildings and power lines if outdoors
• Be prepared for possible aftershocks

Related Guide
Why Earthquakes Happen — A Simple Explanation