A tsunami is a long-wavelength, gravity-driven water wave phenomenon typically generated by large, sudden displacements of the seafloor due to subduction-zone earthquakes, but also by submarine landslides, volcanic eruptions, or impact events. In deep ocean, tsunamis travel at jetliner speeds with low amplitudes and very long periods (minutes to an hour), behaving as shallow-water waves whose phase speed depends on water depth. As they shoal on continental shelves, energy conservation forces rapid increases in wave amplitude and reductions in wavelength and speed, producing highly nonlinear run-up, strong nearshore currents, and complex inundation patterns that are central to hazard assessment and numerical modeling.
The SWOT (Surface Water and Ocean Topography) satellite captured the tsunami spawned by an 8.8 magnitude earthquake off the coast of Russia's Kamchatka Peninsula on July 30, 11:25 a.m. local time. The satellite, a joint effort ...
Earth Sciences
Aug 7, 2025
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When an enormous 8.8 magnitude earthquake struck near Russia's Kamchatka Peninsula, the impact reached far beyond its epicenter. In the passing hours, tsunami alerts were issued by several nations with coastlines along the ...
Earth Sciences
Aug 6, 2025
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On July 30, one of the largest earthquakes ever recorded struck off the Kamchatka peninsula, in Russia's far east. Within minutes, tsunami warnings were issued in Russia, much of Asia and across the Pacific in Hawaii, New ...
Environment
Aug 4, 2025
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If your home was destroyed by a sudden disaster that you couldn't control, you would hope that at the very least, your insurance would cover your losses. However, disaster risk financing systems are struggling to keep pace ...
Earth Sciences
Aug 4, 2025
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After a massive earthquake off the coast of Kamchatka, a peninsula in the far east of Russia, on July 30, 2025, the world watched as the resultant tsunami spread from the epicenter and across the Pacific Ocean at the speed ...
Earth Sciences
Aug 1, 2025
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The earthquake in Russia's Kamchatka peninsula on July 30, 2025, may have been one of the most severe on record, with a magnitude of 8.8. But innovations in science and technology gave governments vital time to warn and evacuate ...
Environment
Jul 31, 2025
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Countries across the Pacific rim lifted tsunami warnings on Wednesday, allowing millions of temporary evacuees to return home.
Environment
Jul 31, 2025
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The earthquake near the east coast of the Kamchatka peninsula in Russia on July 30, 2025 generated tsunami waves that have reached Hawaii and coastal areas of the US mainland. The earthquake's magnitude of 8.8 is significant, ...
Earth Sciences
Jul 30, 2025
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A powerful earthquake struck Wednesday off Russia's Far East coast, flooding a fishing port with waves from a tsunami, cutting power to a few areas and sending some panicked residents fleeing buildings but causing only a ...
Environment
Jul 30, 2025
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A volcano in Russia's far east erupted on Wednesday, Russian scientists said, hours after a major quake prompted evacuations and tsunami alerts across parts of the Pacific coast.
Environment
Jul 30, 2025
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