Earthquake · reviewed by a seismologist
M 1.8ml
Earthquake near Fowler, CO
No earthquake was likely felt in Fowler in the 24 hours to 7:09 am MST (14:09 UTC). The last one was M 3.4, 144 km (90 mi) SW, at 3:34 am MST on 8 November 2026, estimated intensity II (weak) in town; 2 felt reports to USGS. Every earthquake near Fowler
This page: a magnitude 1.8 earthquake was recorded 11 km (7 mi) south-southwest of Fowler, CO, at 12:22 pm MDT on 16 September 2023 (18:22 UTC), 5.0 km deep.
USGS: 11 km SSW of Fowler, Colorado
55 km (34 mi) ESE of Pueblo, CO · 111 km (69 mi) SSE of Colorado Springs, CO
- When
- 12:22 pm MDT on 16 September 2023 ()
- Where
- 11 km (7 mi) south-southwest of Fowler, CO · earthquakes near Fowler
- Magnitude
- M 1.8 (ml)
- Depth
- 5.0 km below the surface
- Felt
- no reports yet
- Nearest
- Otero County, 34 km ESE
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 1089 days ago
Earthquake alerts for Fowler, CO
Get a notification in this browser when USGS records an earthquake near Fowler, CO. No account or email needed.
Alerts are on for .
Not a warning. An alert comes after USGS publishes a quake, usually minutes after the shaking. For early warning use ShakeAlert, through your phone's Wireless Emergency Alerts or the MyShake app.
This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.
At this magnitude and depth, people at rest would likely notice it out to about 16 km (10 mi) from the epicentre. In Fowler, 11 km away, the estimate is intensity II (weak). Estimated from magnitude, depth and distance with the intensity equation USGS Did You Feel It? uses; felt reports, where there are any, are the measurement.
Earthquakes near other towns within 30 km: Rocky Ford.
How big was it?
This earthquake released about 15 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.8 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 1,000,000× the energy of this one
- Magna, Utah 2020 M 5.7 710,000× the energy of this one
- Around the size people start to feel M 3.0 63× the energy of this one
- This earthquake M 1.8 about 15 lb of TNT
Energy from the Gutenberg–Richter relation (log10E = 1.5M + 4.8), rounded to two figures; bar length is magnitude, which is already a logarithm of energy. Magnitudes of past earthquakes from the USGS catalogue.
For this area
No earthquake of M4 or more has been recorded within 50 km since our catalogue begins in 2016.
Before 2016, the USGS record since 1900 lists no earthquake of M5 or more within 50 km.
Since 2016: the QuakeIndex catalogue (US, M1.5+), built from the USGS FDSN event service. Before 2016: USGS ComCat, M5+ from 1900. Distances are between epicentres. This is the record, not a forecast.
Where
Epicentre 38.0312, -104.0583. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Otero County, CO | 34 km (21 mi) | ESE | earthquakes near Otero County |
| Crowley County, CO | 39 km (25 mi) | NE | earthquakes near Crowley County |
| Pueblo County, CO | 40 km (25 mi) | WNW | earthquakes near Pueblo County |
| Las Animas County, CO | 79 km (49 mi) | S | earthquakes near Las Animas County |
| Bent County, CO | 87 km (54 mi) | E | earthquakes near Bent County |
| Huerfano County, CO | 88 km (55 mi) | WSW | earthquakes near Huerfano County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
5 earthquakes have been recorded within 50 km since this one.
- 1.7 16 km NNW of Olney Springs, Colorado
- 1.8 11 km ESE of Boone, Colorado
- 1.9 44 km NE of Hoehne, Colorado
- 1.5 41 km NE of Hoehne, Colorado
- 1.9 42 km NE of Hoehne, Colorado
Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of . QuakeIndex does not forecast aftershocks. When USGS issues an operational aftershock forecast it appears on the USGS event page.
On USGS
- The official USGS event page — the source of record for every value above
- Did you feel it? Report it to USGS — reports go to USGS, not to us
- ShakeMap for this event, when USGS has produced one
QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.