Minor M 3.1 Earthquake Recorded 43 km SW of Karluk, Alaska

Source: USGS · Alaska

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A minor 3.1 magnitude earthquake occurred southwest of Karluk, Alaska, on March 22, 2026, at a depth of 57 kilometers. No damage or tsunami threats were reported.

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

This notice was issued by USGS on February 22, 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 regulatory framework behind it, which shapes what remedies (refunds, replacements, recalls, evacuations) are available to affected individuals and who holds statutory responsibility for enforcement.

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 minor earthquake with a magnitude of 3.1 ml was recorded southwest of Karluk, Alaska. The seismic event occurred at 15:33 UTC on March 22, 2026 (1771688038469). According to the U.S. Geological Survey (USGS), the earthquake originated at a depth of 57 kilometers.

Location Details

The epicenter was located at coordinates 57.305°N, 154.988°W, approximately 43 kilometers (26.7 miles) southwest of Karluk, Alaska. The depth of 57 kilometers classifies this as an intermediate-depth earthquake. Intermediate earthquakes, occurring between 20 and 70 km below the surface, typically result in less intense surface shaking than shallow events of the same magnitude.

Impact Assessment

At this time, there are no felt reports associated with this event. There is no tsunami advisory, watch, or warning in effect. Given the magnitude and location, no damage to structures is expected, and the USGS has not issued a specific alert level color for this routine seismic activity.

What You Should Know

Earthquakes with magnitudes between 2.5 and 3.9 are classified as minor. While they are frequently recorded in seismically active regions like Alaska, they are rarely strong enough to cause damage. Residents are reminded that aftershocks are a common occurrence following seismic events, though they are typically smaller than the initial quake.

Source

Data provided by the USGS Earthquake Hazards Program.

Original source: USGS Official Notice ↗

All Earthquakes →

Frequently Asked Questions

Common questions about this USGS earthquake report.

What is this USGS earthquake report about?
A minor 3.1 magnitude earthquake occurred southwest of Karluk, Alaska, on March 22, 2026, at a depth of 57 kilometers. No damage or tsunami threats were reported.
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 "low" severity. No immediate action required, but stay aware.
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.