Colorado earthquakes
No earthquake of magnitude 2.5 or more has been located in Colorado in the past 30 days. The largest on record there is M5.5 15 km E of Colona, Colorado, Oct 11, 1960. 3 smaller quakes were recorded in the past 7 days.
From the USGS, checked Sun, Sep 20, 2026, 10:26 PM UTC. Times are local to each quake.
Map
Where every quake below was located in Colorado. Select one for its page.
Past 30 days
Magnitude 2.5 and up, newest first.
None in the past 30 days. Most of Colorado’s quakes are small; the largest on record are below.
Smaller quakes, past 7 days
Under magnitude 2.5, which few people feel.
Largest on record in Colorado
The 25 largest in the USGS catalog since 1900, of magnitude 3 and up. Older magnitudes are estimates from historical accounts and early instruments.
By year
Every year the USGS catalog covers.
- 2020s2020202120222023202420252026
- 2010s2010201120122013201420152016201720182019
- 2000s2000200120022003200420052006200720082009
- 1990s1990199119921993199419951996199719981999
- 1980s1980198119821983198419851986198719881989
- 1970s1970197119721973197419751976197719781979
- 1960s1960196119621963196419651966196719681969
- 1950s1950195119521953195419551956195719581959
- 1940s1940194119421943194419451946194719481949
- 1930s1930193119321933193419351936193719381939
- 1920s1920192119221923192419251926192719281929
- 1910s1910191119121913191419151916191719181919
- 1900s1900190119021903190419051906190719081909
What this means
Magnitude measures the energy a quake releases: each step up is about 32 times more energy, so an M6 releases about a thousand times the energy of an M4. Intensity measures the shaking at one place, which depends on the distance, the depth and the ground. One quake has one magnitude and many intensities.
| Intensity | Shaking | What people notice |
|---|---|---|
| I | Not felt | Recorded by instruments only. |
| II to III | Weak | Felt by a few people at rest, mostly on upper floors; hanging objects may swing. |
| IV | Light | Felt indoors by many. Dishes, windows and doors rattle; like a heavy truck passing. |
| V | Moderate | Felt by nearly everyone; sleepers wake. Some dishes break and unstable objects tip over. |
| VI | Strong | Felt by all; heavy furniture moves, plaster cracks. Damage is slight. |
| VII | Very strong | Damage slight to moderate in ordinary buildings, considerable in poorly built ones. |
| VIII | Severe | Considerable damage in ordinary buildings, with partial collapse; chimneys and walls fall. |
| IX and up | Violent to extreme | Heavy damage even in well-designed buildings; many shifted off foundations. |
Did I just feel an earthquake?
A quake appears in these lists within minutes: a few for the US, up to twenty for a quake abroad. Search your town above, or open your state. If it was a quake, tell the USGS through its Did You Feel It? form. If shaking starts: drop, cover and hold on; stay indoors until it stops; near the coast, move to high ground after strong or long shaking without waiting for a warning.
By state
Every state, with the quakes of magnitude 2.5 or more located there in the past 30 days. Each state page adds the smaller quakes of the past week and its largest on record.
- AlabamaNone in 30 days
- Alaska829 in 30 days
- American SamoaNone in 30 days
- ArizonaNone in 30 days
- ArkansasNone in 30 days
- California73 in 30 days
- Colorado3 smaller this week
- ConnecticutNone in 30 days
- DelawareNone in 30 days
- District of ColumbiaNone in 30 days
- FloridaNone in 30 days
- Georgia1 smaller this week
- Guam9 in 30 days
- Hawaii34 in 30 days
- Idaho5 in 30 days
- Illinois1 smaller this week
- IndianaNone in 30 days
- IowaNone in 30 days
- Kansas1 in 30 days
- KentuckyNone in 30 days
- Louisiana1 in 30 days
- Maine1 smaller this week
- MarylandNone in 30 days
- MassachusettsNone in 30 days
- MichiganNone in 30 days
- MinnesotaNone in 30 days
- MississippiNone in 30 days
- Missouri4 smaller this week
- Montana3 in 30 days
- NebraskaNone in 30 days
- Nevada6 in 30 days
- New HampshireNone in 30 days
- New JerseyNone in 30 days
- New Mexico10 in 30 days
- New York1 smaller this week
- North CarolinaNone in 30 days
- North DakotaNone in 30 days
- Northern Mariana Islands10 in 30 days
- OhioNone in 30 days
- Oklahoma3 in 30 days
- Oregon12 in 30 days
- PennsylvaniaNone in 30 days
- Puerto Rico103 in 30 days
- Rhode IslandNone in 30 days
- South CarolinaNone in 30 days
- South DakotaNone in 30 days
- Tennessee3 smaller this week
- Texas36 in 30 days
- U.S. Virgin Islands27 in 30 days
- Utah4 in 30 days
- VermontNone in 30 days
- VirginiaNone in 30 days
- Washington3 in 30 days
- West VirginiaNone in 30 days
- WisconsinNone in 30 days
- Wyoming6 in 30 days
Sources
Earthquakes, magnitudes, depths, shaking estimates and felt reports from the U.S. Geological Survey Earthquake Hazards Program, read from its live feeds and its catalog back to 1900. Tsunami messages from NOAA’s tsunami warning centers.