M 4.0 Light Earthquake Strikes South of False Pass, Alaska

Source: USGS · Alaska

According to the U.S. Census Bureau's American Community Survey (ACS) 5-year estimates, the CDC PLACES population-level health analysis, and the CMS Hospital Compare quality data, Areazine publishes editorial articles drawing on more than 19,000 U.S. city profiles. See our methodology for full source attribution and refresh cadence.

A magnitude 4.0 earthquake occurred approximately 207 kilometers south of False Pass, Alaska, on February 22, 2026. The shallow event was recorded at a depth of 10 kilometers.

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

This notice was issued by USGS on March 3, 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 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 light earthquake with a magnitude of 4.0 mb occurred on February 22, 2026, at 19:12 UTC. The seismic event was centered approximately 207 km south of False Pass, Alaska. According to the U.S. Geological Survey (USGS), the earthquake occurred at a shallow depth of 10 km.

Location Details

The epicenter was located at coordinates 53.0018°N, 163.0753°W. This position places the event in the North Pacific Ocean, south of the Aleutian Islands. The depth of 10 km is classified as shallow; earthquakes at this depth are typically more noticeable than deeper events, though this specific occurrence was located far offshore.

Impact Assessment

As of the latest report, there have been no felt reports submitted to the USGS. There is currently no tsunami advisory, watch, or warning in effect for this event (tsunami status: 0). No alert level color has been assigned, and the event has been officially reviewed by seismologists.

What You Should Know

Light earthquakes (M 4.0-4.9) are noticeable but rarely cause significant damage, especially when located far from populated landmasses. Residents in the region should remain aware that aftershocks are a common occurrence following seismic activity. In the event of shaking, the standard safety procedure is to "Drop, Cover, and Hold On."

Source

Information 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 magnitude 4.0 earthquake occurred approximately 207 kilometers south of False Pass, Alaska, on February 22, 2026. The shallow event was recorded at a depth of 10 kilometers.
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.