Japan’s earthquake planners divide the Nankai fault zone into named segments, each with its own rupture history and hazard clock. The eastern one, called Tokai, hasn’t broken in more than 170 years.
On the evening of Aug. 9, 2025, passengers on the Hanse Explorer finished taking selfies and videos of the South Sawyer ...
Bretwood Higman has spent years scouring Alaska’s mountains for signs of potential landslides. One spot he looked: Tracy Arm Fjord – a popular cruise destination between Juneau and Petersburg. “I didn ...
Most dangerous slopes give some warning. They creep downhill for months or years, leaving cracks that satellites and seismometers can track. Around Alaska’s glaciated fjords, that expectation shapes ...
When a wall of rock collapsed into Southeast Alaska’s Tracy Arm last August, it triggered one of the highest-reaching tsunamis ever recorded in the world. The event happened to be in a place heavily ...
Researchers have concluded that a 2025 tsunami in Alaska was the second largest recorded natural disaster of its kind in history, with a wave that reached up to 1,578 feet high. The massive tsunami ...
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