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M1.6 Depth: 4.5 km

M1.6 Earthquake near Grady County, Oklahoma (United States)

UTC time: 2026-07-31 12:49:59 UTC Local time: —

About this earthquake

On July 31, 2026 at 12:49 UTC, a magnitude M1.6 earthquake occurred near Grady County, Oklahoma (United States). With a focal depth of about 4 km, this was a shallow earthquake, whose shaking is usually felt more strongly at the surface. Events of this size typically go unnoticed.

The event was recorded by USGS. United States: 158 earthquakes were recorded in the past 24 hours, the strongest reaching M3.6.

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Depth profile

Depth profile Depth: 4.5 km (Shallow) Surface Shallow Intermediate Deep 0 km 70 km 300 km 700 km 4.5 km
Shallow
4.5 km
4.5 km — shallower than the regional average (15.5 km)
Regional average: 15.5 km
Why depth matters

Shallow quakes release energy near the surface — shaking is felt more strongly and damage potential is higher.

Depth classes per USGS

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