M 3.3 Earthquake Strikes 50 km NNW of Petersville, 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 3.3 earthquake occurred on July 28, 2026, at 00:00 UTC, centered 50 km north-northwest of Petersville, Alaska, at a depth of 121.1 km.
What this USGS earthquake report tells you, and what most readers miss
This notice was issued by USGS on May 11, 2026 and geographically references Alaska. Its severity classification of "low" 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 magnitude 3.3 ml earthquake occurred 50 km NNW of Petersville, Alaska, at a depth of 121.1 km. The event took place on July 28, 2026, at 00:00 UTC.
Location Details
The earthquake's epicenter was at coordinates 62.908° N latitude and 151.196° W longitude, approximately 50 km north-northwest of Petersville in Alaska. With a depth of 121.1 km, this is considered a deep earthquake (greater than 70 km), which typically originates in the lower crust or upper mantle and may result in less intense shaking at the surface.
Impact Assessment
There have been no felt reports for this earthquake. No tsunami advisory was issued, and no alert level was assigned.
What You Should Know
Earthquakes of this magnitude (3.3) are often felt but rarely cause damage. Aftershocks are possible, and general safety tips include staying informed and, if shaking is felt, dropping to the ground, covering your head, and holding on until it stops.
Source
This information is from the United States Geological Survey (USGS). For more details, visit: USGS Event Page
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 (1,141 characters here).
Similar severity timing
Same severity (low) notices issued closest in time to May 11, 2026.
Frequently Asked Questions
Common questions about this USGS earthquake report.