Real-time coverage of earthquake event — 235 km ESE of Attu Station, Alaska — Pandita Data.
🌍 OPEN LIVE 3D EARTHQUAKE MAPA magnitude 5.8 earthquake struck 235 km east-southeast of Attu Station, Alaska on May 6, 2026 at 14:15 UTC, rupturing at a shallow 10 km depth in one of Earth's most seismically active subduction zones. Despite its moderate magnitude, the remote location in the Aleutian Islands ensured zero felt reports and no tsunami risk. The U.S. Geological Survey issued a GREEN PAGER alert, indicating minimal potential for casualties or economic losses in this sparsely populated region.
The Aleutian Islands mark where the Pacific Plate subducts beneath the North American Plate at a rate of approximately 7.5 cm per year. This convergent plate boundary is one of the world's most prolific earthquake-generating zones, responsible for roughly 11% of all seismic energy released globally. Attu Station, located on Attu Island, sits directly above this subduction interface. The 10 km depth places this event firmly in the upper plate, where brittle fracturing dominates and ruptures propagate efficiently.
At magnitude 5.8, this earthquake released approximately 2.8 × 1014 joules of energy—equivalent to 67 tons of TNT. The shallow focal depth (10 km) means the rupture initiated in a zone of maximum stress concentration where the descending Pacific Plate first begins its transition from brittle to ductile behaviour. Shallow subduction earthquakes typically produce weaker, more distant-traveling seismic waves and generate less seafloor displacement than deeper or larger-magnitude events.
Shallow ruptures (0–25 km): Efficient wave propagation, potential ground shaking hazard for nearby communities, variable tsunami risk depending on vertical seafloor displacement. Deep ruptures (100+ km): Energy dissipates more slowly, waves travel far but with lower amplitude, negligible tsunami generation. This 10 km event is shallow enough to be felt regionally but too remote and magnitude-limited to threaten distant coasts.
Attu Island's population of approximately 170 residents (all at the U.S. Coast Guard and NOAA facility) experienced no felt shaking because the epicenter lay 235 km away. The Aleutian subduction zone has historically produced great earthquakes (M8+), most notably the 1964 Alaska earthquake (M9.2), which triggered a devastating Pacific-wide tsunami. While this 5.8 event poses no immediate hazard, it underscores the persistent strain accumulation along the plate boundary that will eventually produce the next megathrust rupture.
Watch the Pandita Data 3D earthquake simulation to visualize how subduction zone ruptures propagate, release energy, and interact with the seafloor. Understanding plate mechanics transforms earthquake awareness from fear into informed preparedness.
FAQ::[ {"q":"What caused this earthquake?","a":"The Pacific Plate subducting beneath the North American Plate at 7.5 cm/year accumulated stress that ruptured at 10 km depth in the upper plate interface of the Aleutian subduction zone."}, {"q":"Is a tsunami risk associated with this event?","a":"No tsunami warning issued. At magnitude 5.8 with remote epicenter location, vertical seafloor displacement was insufficient to generate a significant tsunami."}, {"q":"What should people near Attu Station do right now?","a":"Monitor USGS alerts for aftershocks and inspect structures for damage. The remote location poses minimal immediate hazard, but aftershocks are possible given subduction zone dynamics."