M 5.8 Earthquake Hits 235 km ESE of Attu Station, Alaska

Source: USGS · 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 5.8 magnitude earthquake occurred 235 km east-southeast of Attu Station, Alaska, at a depth of 10 km on June 28, 2026, at 05:48:52 UTC.

What this USGS earthquake report tells you, and what most readers miss

This notice was issued by USGS on May 8, 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 read it as a data point about the issuing system: how quickly USGS detected the hazard, how precise the geographic or product-identifier scope is, and whether similar notices have clustered in the same category or region in the last 90 days. Cluster patterns frequently precede a broader regulatory action, a single localized USGS earthquake report is isolated; three of them within a quarter often indicate a supply-chain, infrastructure, or seasonal driver that will keep producing notices until something structural changes.

For decision-making, Areazine pairs each alert with the original agency URL, the full agency name, and a timestamp so you can verify the notice against the primary source before acting on it. Tags on this item (earthquake, seismic, usgs, Alaska) map to related alerts in the same area of risk - browsing them together gives a clearer picture than any single notice alone, because the shape of an ongoing issue only becomes visible across multiple sequential alerts.

What Happened

A 5.8 magnitude earthquake, measured as M 5.8 mww, struck 235 km ESE of Attu Station, Alaska, at a depth of 10 kilometers. The event occurred on June 28, 2026, at 05:48:52 UTC.

Location Details

The earthquake was located at coordinates 52.2595° N, 176.518° E, approximately 235 km east-southeast of Attu Station in Alaska. At a depth of 10 km, this is considered a shallow earthquake, which typically results in stronger shaking near the surface compared to deeper events.

Impact Assessment

There were no felt reports for this earthquake. No tsunami advisory was issued, and the alert level is green, indicating a low level of concern.

What You Should Know

This moderate earthquake may cause damage to poorly constructed buildings. Be aware of the possibility of aftershocks, and follow general safety tips such as securing heavy items and knowing how to drop, cover, and hold on during shaking.

Source

Information from the United States Geological Survey (USGS). Visit: https://earthquake.usgs.gov/earthquakes/eventpage/us6000svnr for more details.

Original source: USGS Official Notice ↗

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Frequently Asked Questions

Common questions about this USGS earthquake report.

What is this USGS earthquake report about?
A 5.8 magnitude earthquake occurred 235 km east-southeast of Attu Station, Alaska, at a depth of 10 km on June 28, 2026, at 05:48:52 UTC.
Which agency issued this alert?
This alert was issued by USGS. The original notice is available at the source link at the bottom of this article.
How severe is this alert?
This alert is classified as "medium" severity. Stay informed and follow agency guidance.
What area is affected?
This alert affects Alaska. Check with USGS for the most current geographic scope.
Where can I find more Earthquakes updates?
Browse the full Earthquakes feed on Areazine at areazine.com/earthquakes/ for the latest updates from USGS and other agencies.