Colorado earthquakes

M1.5 earthquake 14 km SSE of Stonewall Gap, Colorado

A magnitude 1.5 earthquake struck 14 km SSE of Stonewall Gap, Colorado on Tue, Sep 5, 2023, 4:45 PM MDT (22:45 UTC), 9 km (6 mi) below the surface.

A larger quake followed: M3.6 8 km NNW of Segundo, 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
1.5 (ml), micro
Local time
UTC
2023-09-05 22:45:45 UTC
Depth
9.1 km (5.7 mi), shallow
Epicenter
37.023° N, 105.003° W
Region
Colorado
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 1.6 km horizontally, 9.1 km in depth
Magnitude uncertainty
±0.13
Depth from
From location
Station coverage gap
178°
Stations used
5

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 40 in the 60 days after this one and 36 in the 30 days before it.

After

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000ldde. Read Wed, Sep 30, 2026, 6:59 PM UTC.