Giant Crack Under America Could Trigger a Tsunami 100 Feet High

A massive geological fault beneath the Pacific Northwest could unleash a devastating earthquake, and the resulting movement of the seafloor could send a tsunami racing toward the American coast. The Cascadia Subduction Zone stretches for hundreds of miles offshore, where one tectonic plate dives beneath another and enormous stress can build up over centuries. Scientists warn that a major rupture could trigger powerful waves, giving some coastal communities very little time to reach higher ground. In the worst-case scenarios, tsunami waves could reach extraordinary heights in certain locations, although the actual impact would depend on the earthquake, seafloor movement, and local coastline. So how dangerous is this hidden fault, why are experts watching it so closely, and could the next major rupture transform the Pacific Northwest in minutes?

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CC BY 4.0 https://creativecommons.org/licenses/by/4.0/deed.en
The rock plates of the earth's crust are constantly in motion: by ZDF/Terra X/Julia Kammerer/Martin Schaaf/Maximilian Mohr https://commons.wikimedia.org/wiki/File:So_entsteht_ein_Erdbeben.webm
The shifting of tectonic plates: by ZDF/Terra X/Faszination Erde/C. Götz-Sobel/O. Rötz/M. Zimmermann/Maximilian Mohr https://commons.wikimedia.org/wiki/File:Entstehung_und_Quellen_des_Himalaya-Gebirges.webm
Tonga Volcano Tsunami: by Steven N. Ward https://commons.wikimedia.org/wiki/File:Tonga_Volcano_Tsunami_15_January_2022.webm
NOAA Tsunami Animation: by NOAA https://commons.wikimedia.org/wiki/File:NOAA_Tsunami_Animation-2016.webm
2004 Indonesia Tsunami: by NOAA https://commons.wikimedia.org/wiki/File:2004_Indonesia_Tsunami_Complete.gif
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