Minor M 3.3 Earthquake Recorded 74 km NNW of Karluk, 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 minor 3.3 magnitude earthquake occurred near Karluk, Alaska, at a depth of 95.9 km on March 21, 2026. No tsunami warnings were issued.
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 "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 minor earthquake with a magnitude of 3.3 ml occurred on March 21, 2026, at 11:26 UTC. The seismic event was recorded at a depth of 95.9 km.
Location Details
The earthquake's epicenter was situated at coordinates 58.222°N, 154.733°W, approximately 74 km north-northwest of Karluk, Alaska. With a depth of 95.9 km, this is classified as a deep earthquake (greater than 70 km), which typically results in less intense shaking at the surface compared to shallow events.
Impact Assessment
At this time, there have been no felt reports submitted to the USGS. There is no tsunami advisory, watch, or warning in effect for this event. No damage or injuries have been reported, consistent with the magnitude and depth of the tremor.
What You Should Know
Earthquakes in the M 2.5-3.9 range are categorized as minor. While they are routine geological events in Alaska, they serve as a reminder of the region's active seismic nature. Aftershocks are possible following any earthquake, though they are generally smaller than the initial event.
Source
Event data and details provided by the USGS.
Original source: USGS Official Notice ↗
Related Earthquakes
All Earthquakes →Frequently Asked Questions
Common questions about this USGS earthquake report.