Oklahoma earthquakes

M1.6 earthquake 3 km SSE of Union City, Oklahoma

A magnitude 1.6 earthquake struck 3 km SSE of Union City, Oklahoma on Sun, Mar 21, 2021, 6:59 AM CDT (11:59 UTC), 6 km (3 mi) below the surface.

A larger quake followed: M1.7 5 km NW of Bison, Oklahoma. This one was a foreshock.

Union City forecastMore in Oklahoma

Map

Where this earthquake was located, with the others nearby. Select one for its page.

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The earthquake

Magnitude
1.6 (ml), micro
Local time
UTC
2021-03-21 11:59:52 UTC
Depth
5.5 km (3.4 mi), shallow
Epicenter
35.364° N, 97.922° W
Region
Oklahoma
Felt reports
1
Tsunami flag
No
Status
Reviewed by a seismologist

Did you feel it?

1 person reported to the USGS what they felt; the strongest reported shaking was II, weak shaking.

Did You Feel It? map: shaking reported by the public
Shaking reported by the public, by area. Map: USGS Did You Feel It?

How well it is located

Reviewed by a seismologist.

Magnitude uncertainty
±0.20
Station coverage gap
46°
Stations used
45

Nearest places

Distance and direction from each place to the epicenter, with its forecast.

Nearby

Within 100 km, magnitude 1.5 and up: 76 in the 60 days after this one and 69 in the 30 days before it.

After

The first 60 of 76.

Before

Earthquakes todayOklahoma earthquakesLive radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event ok2021fpgm (also filed as us7000dlfg). Read Tue, Sep 22, 2026, 11:33 AM UTC.