M3.8 Earthquake 33 km ENE of Ferry, Alaska — September 13, 2022
2022-09-13 23:41:28 UTC (2022-09-13) · approx. 1:41 PM UTC-10 local
Felt by 176 people across surrounding communities.
On September 13, 2022 at 23:41 UTC, a magnitude 3.8 shallow crustal earthquake struck 33 km ENE of Ferry, Alaska, at a depth of 13.6 km and coordinates 64.1571°, -148.5016°. The earthquake was reported felt by 176 peopleacross surrounding communities, with a maximum shaking intensity of Modified Mercalli Intensity (MMI) 3.5 (light).
Physical scale: An earthquake of magnitude 3.8 releases seismic energy equivalent to roughly 7.6 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 252 m — 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
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 176 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
Earthquake Details
-148.5016°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 3.8 earthquake near Ferry, Alaska?
The magnitude 3.8 earthquake that struck 33 km ENE of Ferry, Alaska on September 13, 2022 at 23:41 UTC had a depth of 13.6 km. It was felt by 176 people with maximum shaking intensity of MMI 3.5 (light). For context, this was a minor earthquake typically detected only by instruments.
Where did the earthquake occur?
The earthquake epicenter was located at 64.1571°, -148.5016°, which is 33 km ENE of Ferry, Alaska. View all earthquakes in Alaska.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 3.8 earthquakes can continue for several days 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 3.8 event is significantly smaller than that historical record.
Authoritative source: USGS event page (event ID: ak022brrinwo). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2022, September 13, 2022). M3.8 Earthquake 33 km ENE of Ferry, Alaska — September 13, 2022. Retrieved November 19, 2022 from https://www.earthquaketracker.org/earthquakes/event/ak022brrinwo/