M 4.9 Light Earthquake Strikes 70 km SW of Atka, Alaska
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A magnitude 4.9 earthquake occurred near Atka, Alaska, on March 1, 2026. The intermediate-depth event was recorded at 54.52 km below the surface with no tsunami threat.
What this USGS earthquake report tells you, and what most readers miss
This notice was issued by USGS on April 6, 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 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 light earthquake with a magnitude of 4.9 mb was recorded on March 1, 2026, at 05:17:54 UTC. The seismic event occurred at a depth of 54.52 km and has been reviewed by seismologists.
Location Details
The earthquake's epicenter was situated at coordinates 51.7376°N, 174.9027°W, approximately 70 km southwest of Atka, Alaska. At a depth of 54.52 km, this is classified as an intermediate-depth earthquake. Intermediate earthquakes (20-70km) typically cause less surface damage than shallower events but can be felt over a wider area.
Impact Assessment
As of the latest report, there are no felt reports associated with this event. No tsunami advisory, watch, or warning has been issued (tsunami status: 0). The USGS recorded a Modified Mercalli Intensity (MMI) of 3.126, which corresponds to light shaking. No alert level color was assigned to this event.
What You Should Know
Earthquakes with magnitudes between 4.0 and 4.9 are classified as "light." While they are frequently felt and can cause noticeable shaking, they rarely result in significant structural damage. Residents in the Aleutian Islands region should remain aware of the possibility of aftershocks, which are common following an event of this size.
Source
Data and attribution provided by the USGS Earthquake Hazards Program.
Original source: USGS Official Notice ↗
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