Oklahoma earthquakes

M1.8 earthquake 12 km S of Cedar Valley, Oklahoma

A magnitude 1.8 earthquake struck 12 km S of Cedar Valley, Oklahoma on Mon, Apr 23, 2018, 9:05 PM CDT (02:05 UTC), 9 km (5 mi) below the surface.

A larger quake followed: M4.0 10 km SSE of Marshall, Oklahoma. This one was a foreshock.

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Map

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

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The earthquake

Magnitude
1.8 (ml), micro
Local time
UTC
2018-04-24 02:05:58 UTC
Depth
8.7 km (5.4 mi), shallow
Epicenter
35.754° N, 97.536° W
Region
Oklahoma
Tsunami flag
No
Status
Reviewed by a seismologist

Did you feel it?

No one has reported feeling this quake to the USGS.

How well it is located

Reviewed by a seismologist.

Location uncertainty
About 0.7 km horizontally, 6.3 km in depth
Magnitude uncertainty
±0.05
Depth from
From location
Station coverage gap
67°
Stations used
57

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 73 in the 60 days after this one and 66 in the 30 days before it.

After

The first 60 of 73.

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us1000dr2p. Read Mon, Sep 28, 2026, 10:51 AM UTC.