M4.7 Earthquake 40 km S of Evanston, Wyoming — January 22, 2026
2026-01-22 14:49:20 UTC (2026-01-22) · approx. 7:49 AM UTC-7 local
Felt by 4,303 people across a wide area. Maximum shaking intensity MMI 4.6 (moderate).
On January 22, 2026 at 14:49 UTC, a magnitude 4.7 shallow crustal earthquake struck 40 km S of Evanston, Wyoming, at a depth of 14.7 km and coordinates 40.9105°, -110.8745°. The earthquake was reported felt by 4,303 peopleacross a wide area, with a maximum shaking intensity of Modified Mercalli Intensity (MMI) 4.6 (moderate). The USGS PAGER system issued a green alert level for this event, indicating no significant casualties or damage expected. This earthquake was detected by 41 seismic stations with excellent location accuracy and was assigned a USGS significance rating of 793, making it a moderate-impact event. The nearest populated place is Coalville (population 1,363).
Physical scale: An earthquake of magnitude 4.7 releases seismic energy equivalent to roughly 142 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 974 m — a useful intuition for the size of the slip patch on the fault.
The epicenter is located in Wyoming, a region characterized by the Yellowstone volcanic system and Teton Fault, where a mantle plume drives volcanic seismicity and crustal extension. The nearest mapped fault system is the Teton Fault. View all earthquakes in Wyoming.
Learn more: Magnitude scale · Aftershock sequences
Nearest Populated Places
What the Shaking Felt Like
At MMI 4.6 (moderate), people in the most strongly affected areas would have experienced: Mild shaking, similar to a passing truck. Hanging objects swing. Glasses and dishes may rattle. Not commonly felt outdoors.
ShakeMap — predicted shaking intensity
Modeled ground-motion intensity contoured on the Modified Mercalli scale (MMI). Computed by the USGS from the moment-tensor solution and regional ground-motion prediction equations.
Source: U.S. Geological Survey ShakeMap. View interactive ShakeMap on USGS
Did You Feel It? — community-reported shaking
Aggregated felt-report intensity from 4,303 citizen responses to the USGS Did You Feel It? system. Each colored zone represents the average MMI from reports in that area.
Source: U.S. Geological Survey Did You Feel It?. View on USGS · submit your own report
Population exposure (USGS PAGER)
Estimated population that experienced each level of shaking. Based on the USGS PAGER rapid impact assessment, which combines ShakeMap output with global population grids.
| Shaking intensity (MMI) | Description | Population exposed |
|---|---|---|
| MMI 3 | weak | 2,154,383 |
| MMI 4 | light | 196 |
Earthquake Details
-110.8745°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 4.7 earthquake near Evanston, Wyoming?
The magnitude 4.7 earthquake that struck 40 km S of Evanston, Wyoming on January 22, 2026 at 14:49 UTC had a depth of 14.7 km. It was felt by 4,303 people with maximum shaking intensity of MMI 4.6 (moderate). For context, this was a light earthquake commonly felt near the epicenter.
Where did the earthquake occur?
The earthquake epicenter was located at 40.9105°, -110.8745°, which is 40 km S of Evanston, Wyoming. The nearest populated place is Coalville (population 1,363). View all earthquakes in Wyoming.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 4.7 earthquakes can continue for several days and gradually diminish over time.
Has Wyoming had earthquakes this big before?
The largest recorded earthquake in Wyoming was the M6.5 Yellowstone Lake earthquake of June 30, 1975. Today's magnitude 4.7 event is significantly smaller than that historical record.
What should I do after an earthquake?
If you were in the affected area: check yourself and others for injuries, inspect your home for damage, and be prepared for aftershocks. For detailed guidance, see our earthquake safety guide and emergency planning resources.
Authoritative source: USGS event page (event ID: uu80127891). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2026, January 22, 2026). M4.7 Earthquake 40 km S of Evanston, Wyoming — January 22, 2026. Retrieved May 18, 2026 from https://www.earthquaketracker.org/earthquakes/event/uu80127891/