Colorado earthquakes

M3.2 earthquake 9 km N of Segundo, Colorado

A magnitude 3.2 earthquake struck 9 km N of Segundo, Colorado on Thu, Aug 17, 2023, 10:51 AM MDT (16:51 UTC), 5 km (3 mi) below the surface.

A larger quake followed: M4.0 19 km SSW of Weston, Colorado. 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
3.2 (ML, local (Richter)), minor
Magnitude from
USGS National Earthquake Information Center
Local time
UTC
2023-08-17 16:51:26 UTC
Depth
4.9 km (3.0 mi), shallow
Epicenter
37.207° N, 104.772° W
Region
Colorado
Felt reports
3
Tsunami flag
No
Status
Reviewed by a seismologist

Did you feel it?

3 people reported to the USGS what they felt; the strongest reported shaking was IV, light 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.

Location uncertainty
About 2.8 km horizontally, 5.8 km in depth
Magnitude uncertainty
±0.07
Depth from
From location
Station coverage gap
58°
Stations used
29

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 66 in the 60 days after this one and 22 in the 30 days before it.

After

The first 60 of 66.

Before

Earthquakes todayColorado earthquakesLive radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us7000kp2h. Read Sat, Oct 3, 2026, 1:34 PM UTC.