M 3.5 Earthquake 73 km NNE of Petersville, Alaska
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A magnitude 3.5 ml earthquake occurred 73 km NNE of Petersville, Alaska at a depth of 107.9 km.
What this USGS earthquake report tells you, and what most readers miss
This notice was issued by USGS on July 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 M 3.5 ml earthquake struck 73 km NNE of Petersville, Alaska. The event occurred at 2026-07-09 12:00:56 UTC with a depth of 107.9 km.
Location Details
The earthquake was located at latitude 63.135, longitude -150.415. The depth of 107.9 km classifies it as a deep earthquake (greater than 70 km).
Impact Assessment
No felt reports were recorded. There was no tsunami advisory (tsunami field: 0) and no alert level was issued.
What You Should Know
This was a minor earthquake (M 2.5-3.9) that is often felt but rarely causes damage. Deep earthquakes like this one are common in Alaska.
Source
https://earthquake.usgs.gov/earthquakes/eventpage/aka2026nqafsx (USGS)
Original source: USGS Official Notice ↗
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