M4.4 Earthquake 259 km WSW of Adak, Alaska — September 27, 2026
2026-09-27 10:30:26 UTC (51 min ago) · approx. 10:30 PM UTC+12 local
On September 27, 2026 at 10:30 UTC, a magnitude 4.4 shallow crustal earthquake struck 259 km WSW of Adak, Alaska, at a depth of 18.0 km and coordinates 51.2307°, 179.7625°.
Physical scale: An earthquake of magnitude 4.4 releases seismic energy equivalent to roughly 60 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 655 m — a useful intuition for the size of the slip patch on the fault.
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
Earthquake Details
179.7625°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 4.4 earthquake near Adak, Alaska?
The magnitude 4.4 earthquake that struck 259 km WSW of Adak, Alaska on September 27, 2026 at 10:30 UTC had a depth of 18.0 km. For context, this was a light earthquake commonly felt near the epicenter.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 4.4 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 4.4 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us6000txye). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2026, September 27, 2026). M4.4 Earthquake 259 km WSW of Adak, Alaska — September 27, 2026. Retrieved September 27, 2026 from https://www.earthquaketracker.org/earthquakes/event/us6000txye/