Colorado earthquakes

M1.6 earthquake Colorado

A magnitude 1.6 earthquake struck in Colorado on Wed, Sep 20, 2023, 10:39 PM MDT (04:39 UTC), 6 km (4 mi) below the surface.

A larger quake followed: M2.8 9 km NNW of El Moro, 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
1.6 (ml), micro
Local time
UTC
2023-09-21 04:39:51 UTC
Depth
6.1 km (3.8 mi), shallow
Epicenter
37.308° N, 104.491° 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 1.2 km horizontally, 2.5 km in depth
Magnitude uncertainty
±0.13
Depth from
From location
Station coverage gap
73°
Stations used
10

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 22 in the 60 days after this one and 51 in the 30 days before it.

After

  1. 2.2Colorado · 1102 days ago · 5 km deep · 32 km away
  2. 1.510 km SSE of Walsenburg, Colorado · 1099 days ago · 5 km deep · 33 km away
  3. 1.613 km ENE of Colorado City, Colorado · 1096 days ago · 5 km deep · 76 km away
  4. 1.612 km S of Weston, Colorado · 1094 days ago · 5 km deep · 45 km away
  5. 1.923 km S of Weston, Colorado · 1093 days ago · 5 km deep · 54 km away
  6. 1.711 km SSE of Walsenburg, Colorado · 1091 days ago · 5 km deep · 32 km away
  7. 1.710 km SE of Walsenburg, Colorado · 1091 days ago · 5 km deep · 33 km away
  8. 1.515 km SSW of Weston, Colorado · 1088 days ago · 5 km deep · 50 km away
  9. 1.513 km S of Stonewall Gap, Colorado · 1083 days ago · 5 km deep · 55 km away
  10. 1.76 km WNW of Hoehne, Colorado · 1083 days ago · 5 km deep · 3 km away
  11. 1.711 km NE of Stonewall Gap, Colorado · 1081 days ago · 5 km deep · 41 km away
  12. 2.89 km NNW of El Moro, Colorado · 1079 days ago · 5 km deep · 1 km away · felt by 4
  13. 1.534 km NNE of Cimarron, New Mexico · 1068 days ago · 5 km deep · 63 km away
  14. 2.016 km SW of Weston, Colorado · 1066 days ago · 5 km deep · 53 km away
  15. 2.017 km S of Weston, Colorado · 1062 days ago · 5 km deep · 49 km away
  16. 1.618 km S of Weston, Colorado · 1062 days ago · 5 km deep · 49 km away
  17. 2.126 km SSW of Segundo, Colorado · 1057 days ago · 5 km deep · 55 km away
  18. 2.026 km SSW of Segundo, Colorado · 1057 days ago · 5 km deep · 55 km away
  19. 1.825 km S of Weston, Colorado · 1057 days ago · 5 km deep · 55 km away
  20. 2.126 km S of Weston, Colorado · 1056 days ago · 5 km deep · 55 km away
  21. 1.67 km WNW of Hoehne, Colorado · 1056 days ago · 5 km deep · 2 km away
  22. 2.032 km S of Weston, Colorado · 1048 days ago · 5 km deep · 61 km away

Before

  1. 1.69 km WNW of Hoehne, Colorado · 1105 days ago · 5 km deep · 1 km away
  2. 2.87 km NNW of El Moro, Colorado · 1105 days ago · 5 km deep · 2 km away · felt by 8
  3. 1.5Colorado · 1105 days ago · 5 km deep · 4 km away · felt by 1
  4. 2.214 km E of Colorado City, Colorado · 1106 days ago · 5 km deep · 75 km away
  5. 1.58 km N of Segundo, Colorado · 1106 days ago · 5 km deep · 25 km away
  6. 2.314 km E of Colorado City, Colorado · 1106 days ago · 5 km deep · 75 km away
  7. 2.413 km E of Colorado City, Colorado · 1106 days ago · 5 km deep · 75 km away
  8. 1.59 km NNW of El Moro, Colorado · 1108 days ago · 5 km deep · 0 km away
  9. 1.79 km NNW of El Moro, Colorado · 1108 days ago · 5 km deep · 1 km away
  10. 1.811 km SSW of Fowler, Colorado · 1109 days ago · 5 km deep · 89 km away
  11. 2.27 km N of El Moro, Colorado · 1112 days ago · 5 km deep · 2 km away
  12. 1.98 km N of El Moro, Colorado · 1114 days ago · 5 km deep · 1 km away
  13. 1.97 km WNW of Hoehne, Colorado · 1114 days ago · 5 km deep · 3 km away
  14. 1.76 km N of Hoehne, Colorado · 1114 days ago · 5 km deep · 11 km away
  15. 1.78 km N of Segundo, Colorado · 1114 days ago · 7 km deep · 26 km away
  16. 2.59 km SE of Walsenburg, Colorado · 1115 days ago · 5 km deep · 34 km away
  17. 3.47 km N of Valdez, Colorado · 1115 days ago · 7 km deep · 24 km away · felt by 9
  18. 3.68 km NNW of Segundo, Colorado · 1115 days ago · 2 km deep · 29 km away · felt by 26
  19. 2.413 km SSE of Stonewall Gap, Colorado · 1116 days ago · 5 km deep · 52 km away
  20. 1.914 km S of Stonewall Gap, Colorado · 1117 days ago · 5 km deep · 56 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us7000kx1d. Read Tue, Sep 29, 2026, 9:29 PM UTC.