M6.0 Earthquake 12 km WNW of Susitna, Alaska — November 27, 2025
2025-11-27 17:11:29 UTC (2025-11-27) · approx. 7:11 AM UTC-10 local
Felt by 7,198 people across a wide area. Maximum shaking intensity MMI 5.9 (strong).
On November 27, 2025 at 17:11 UTC, a magnitude 6.0 shallow crustal earthquake struck 12 km WNW of Susitna, Alaska, at a depth of 69.4 km and coordinates 61.5695°, -150.7508°. The earthquake was reported felt by 7,198 peopleacross a wide area, with a maximum shaking intensity of Modified Mercalli Intensity (MMI) 5.9 (strong). The USGS PAGER system issued a green alert level for this event, indicating no significant casualties or damage expected. This earthquake was detected by 225 seismic stations with excellent location accuracy and was assigned a USGS significance rating of 1134, making it one of the most significant global earthquakes in recent days. The nearest populated place is Willow (population 2,102).
Physical scale: An earthquake of magnitude 6.0 releases seismic energy equivalent to roughly 15 kilotons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 8.3 km — a useful intuition for the size of the slip patch on the fault.
The epicenter is located in Alaska, a region characterized by Pacific Plate subduction beneath the North American Plate, producing frequent megathrust and crustal earthquakes along the Aleutian arc. The nearest mapped fault system is the Aleutian megathrust. View all earthquakes in Alaska.
Learn more: Magnitude scale · Aftershock sequences
Nearest Populated Places
What the Shaking Felt Like
At MMI 5.9 (strong), people in the most strongly affected areas would have experienced: Moderate shaking that everyone in the area would feel. Sleeping people are awakened. Dishes and windows may break. Unstable objects may be knocked over.
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 7,198 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 | 47,081 |
| MMI 4 | light | 250,758 |
| MMI 5 | moderate | 168,688 |
| MMI 6 | strong | 1 |
Earthquake Details
-150.7508°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 6.0 earthquake near Susitna, Alaska?
The magnitude 6.0 earthquake that struck 12 km WNW of Susitna, Alaska on November 27, 2025 at 17:11 UTC had a depth of 69.4 km. It was felt by 7,198 people with maximum shaking intensity of MMI 5.9 (strong). For context, this was a strong earthquake capable of causing significant damage.
Where did the earthquake occur?
The earthquake epicenter was located at 61.5695°, -150.7508°, which is 12 km WNW of Susitna, Alaska. The nearest populated place is Willow (population 2,102). View all earthquakes in Alaska.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 6.0 earthquakes can continue for weeks to months and gradually diminish over time.
Has Alaska had earthquakes this big before?
The largest recorded earthquake in Alaska was the M9.2 Great Alaska earthquake of March 27, 1964. Today's magnitude 6.0 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: ak2025xjbvhj). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2025, November 27, 2025). M6.0 Earthquake 12 km WNW of Susitna, Alaska — November 27, 2025. Retrieved May 24, 2026 from https://www.earthquaketracker.org/earthquakes/event/ak2025xjbvhj/