M 4.1 Earthquake 104 km SSW of Nikolski, Alaska
Areazine synthesizes this USGS earthquake report directly from USGS's official public data feed. See our methodology for full source attribution and refresh cadence.
A magnitude 4.1 earthquake occurred 104 km SSW of Nikolski, Alaska at a depth of 20.8 km.
What this USGS earthquake report tells you, and what most readers miss
This notice was issued by USGS on September 4, 2026 and geographically references Alaska. Its severity classification of "medium" signals how the issuing agency weighs the risk of harm if no action is taken - "critical" and "high" tier alerts typically carry direct consumer actions, while "medium" and "low" tend toward informational guidance or monitoring advisories. The category it belongs to - Earthquakes - determines the monitoring protocol behind it, which shapes what follow-up action (checking for structural damage, watching for aftershocks, reviewing local building codes) is relevant and which agency holds authority over the assessment.
Most readers skim a notice like this, check whether they are personally affected, and move on. The more useful lens is to verify its scope, source, and timestamp, then compare related notices without assuming that one record proves a broader trend.
Areazine pairs this record with the original agency URL so you can check the primary source before acting. Its related labels are earthquake, seismic, usgs, Alaska.
What Happened
A M 4.1 ml earthquake struck 104 km SSW of Nikolski, Alaska on August 4, 2026 at 12:46:57 UTC. The event had a depth of 20.8 km and was reviewed by the USGS.
Location Details
The epicenter was located at latitude 52.037, longitude -169.302, approximately 104 km south-southwest of Nikolski, Alaska. The depth of 20.8 km places it at the lower end of the shallow range.
Impact Assessment
No felt reports were recorded. The Modified Mercalli Intensity was estimated at 2.139. There was no tsunami advisory (tsunami flag: 0) and no alert level issued.
What You Should Know
This was classified as a light earthquake. Such events are often felt but rarely cause damage. Residents in the region should be prepared for possible aftershocks.
Source
Original source: USGS Official Notice ↗
Related Earthquakes
All Earthquakes →Nationwide notices with similar length or severity timing 8
Two Areazine-derived peer sets for this USGS earthquake report: nearest notices by body length and by same severity near the same agency date. Peers come from other categories so they are not the same-feed Related list above.
Similar body length
Nearest notices by article body length (856 characters here).
Similar severity timing
Same severity (medium) notices issued closest in time to September 4, 2026.
Frequently Asked Questions
Common questions about this USGS earthquake report.