M3.0 Earthquake 221 km W of Adak, Alaska — July 4, 2026
2026-07-04 15:00:55 UTC (2026-07-04) · approx. 3:00 AM UTC-12 local
On July 4, 2026 at 15:00 UTC, a magnitude 3.0 intermediate depth earthquake struck 221 km W of Adak, Alaska, at a depth of 183.1 km and coordinates 51.7723°, -179.8498°.
Physical scale: An earthquake of magnitude 3.0 releases seismic energy equivalent to roughly 477 kg of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 71 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-179.8498°E
Technical Information
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Common Questions
How strong was the magnitude 3.0 earthquake near Adak, Alaska?
The magnitude 3.0 earthquake that struck 221 km W of Adak, Alaska on July 4, 2026 at 15:00 UTC had a depth of 183.1 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 3.0 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 3.0 earthquakes are typically only recorded by instruments.
Authoritative source: USGS event page (event ID: us7000szkw). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2026, July 4, 2026). M3.0 Earthquake 221 km W of Adak, Alaska — July 4, 2026. Retrieved July 12, 2026 from https://www.earthquaketracker.org/earthquakes/event/us7000szkw/