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M1.9 Depth: 7.6 km

M1.9 Earthquake near Jefferson County, Oklahoma (United States)

UTC time: 2026-08-21 16:29:46 UTC Local time: —

About this earthquake

A magnitude M1.9 earthquake was recorded near Jefferson County, Oklahoma (United States) on August 21, 2026 at 16:29 UTC. The hypocenter lay relatively close to the surface at around 8 km, increasing how strongly it was felt. Events of this size typically go unnoticed.

The event was recorded by USGS. United States: 221 earthquakes were recorded in the past 24 hours, the strongest reaching M3.3.

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Depth profile

Depth profile Depth: 7.6 km (Shallow) Surface Shallow Intermediate Deep 0 km 70 km 300 km 700 km 7.6 km
Shallow
7.6 km
7.6 km — shallower than the regional average (15.4 km)
Regional average: 15.4 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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