M3.9 Earthquake in the Kodiak Island region, Alaska — November 6, 2023
2023-11-06 23:15:55 UTC (2023-11-06) · approx. 1:15 PM UTC-10 local
On November 6, 2023 at 23:15 UTC, a magnitude 3.9 shallow crustal earthquake struck in the Kodiak Island region, Alaska, at a depth of 28.1 km and coordinates 57.4874°, -154.1736°.
Physical scale: An earthquake of magnitude 3.9 releases seismic energy equivalent to roughly 11 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 296 m — a useful intuition for the size of the slip patch on the fault.
Did You Feel It? — community-reported shaking
Aggregated felt-report intensity from 1 citizen response 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
-154.1736°E
Technical Information
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Common Questions
How strong was the magnitude 3.9 earthquake in the Kodiak Island region, Alaska?
The magnitude 3.9 earthquake that struck in the Kodiak Island region, Alaska on November 6, 2023 at 23:15 UTC had a depth of 28.1 km. For context, this was a minor earthquake typically detected only by instruments.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 3.9 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 3.9 earthquakes are typically only recorded by instruments.
Authoritative source: USGS event page (event ID: ak023e92e3yg). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2023, November 6, 2023). M3.9 Earthquake in the Kodiak Island region, Alaska — November 6, 2023. Retrieved January 13, 2024 from https://www.earthquaketracker.org/earthquakes/event/ak023e92e3yg/