M 5.0 Earthquake Hits 216 km WSW of Adak, 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 magnitude 5.0 earthquake occurred 216 km west-southwest of Adak, Alaska, at a depth of 35 km, with no tsunami advisory issued.
What this USGS earthquake report tells you, and what most readers miss
This notice was issued by USGS on April 18, 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 magnitude 5.0 earthquake, specifically M 5.0 mb, struck 216 km WSW of Adak, Alaska. The event occurred on July 25, 2026, at 10:15:09 UTC (converted from Unix timestamp 1776518109117), at a depth of 35 km.
Location Details
The earthquake was centered at coordinates 51.42 latitude and -179.6701 longitude, approximately 216 km west-southwest of Adak, Alaska. At 35 km deep, this is considered an intermediate depth earthquake (between 20-70 km), which can sometimes be felt over a wider area compared to shallower events.
Impact Assessment
There were no felt reports available for this event. No tsunami advisory was issued, as indicated by the tsunami status of 0, and no alert level was provided.
What You Should Know
This moderate earthquake, with a magnitude of 5.0, may cause noticeable shaking and potential damage to poorly constructed buildings in the vicinity. It is possible for aftershocks to occur following such events; residents should follow standard safety tips like dropping to the ground, covering their head and neck, and holding on during shaking.
Source
Information is sourced from the USGS. For more details, visit: https://earthquake.usgs.gov/earthquakes/eventpage/us6000sr43
Original source: USGS Official Notice ↗
Related Earthquakes
All Earthquakes →Nationwide notices with similar length or severity timing 8
Two Areazine-derived peer sets for this USGS earthquake report: nearest notices by body length and by same severity near the same agency date. Peers come from other categories so they are not the same-feed Related list above.
Similar body length
Nearest notices by article body length (1,231 characters here).
Similar severity timing
Same severity (medium) notices issued closest in time to April 18, 2026.
Frequently Asked Questions
Common questions about this USGS earthquake report.