ORMOUS 🌒 on Instagram: "The biggest tsunami ever recorded struck Alaska in 1958 — and surprisingly, it wasn’t triggered by an earthquake, but by a massive rockfall. When millions of cubic meters of rock plunged into Lituya Bay, the impact created a wave so huge it surged 520 meters (1,720 feet) up the fjord walls. That’s taller than the Empire State Building! 🌊 Most tsunamis happen far out at sea and go unnoticed, but some are powerful enough to reshape coastlines and history in a matter of se

Explaining The Universe on Instagram: "A tsunami doesn’t begin with towering waves crashing onto shore, it often starts deep beneath the ocean. Most tsunamis are triggered by powerful undersea earthquakes, when tectonic plates suddenly shift and displace massive amounts of water. This sudden movement creates a pulse of energy that travels outward across the sea. In the open ocean, tsunami waves may only be a few feet tall and pass unnoticed beneath ships, but they move incredibly fast, up to 500