Imagine a wave taller than any skyscraper you’ve ever seen—up to 1,000 feet high—crashing onto the U.S. West Coast. That’s the warning from a recent scientific study. While it sounds like something out of a disaster movie, experts say it’s not impossible. Let’s break it down.
What Exactly Is a Mega-Tsunami?
A mega-tsunami is different from the usual tsunami you hear about after an earthquake. Instead of being caused by the seafloor moving, a mega-tsunami happens when a huge chunk of land—like a mountain or glacier—collapses into the ocean, instantly pushing an enormous wave toward the shore.
Why Are Scientists Worried?
1. The Cascadia Subduction Zone:
This is a massive fault line off the coasts of California, Oregon, and Washington. It’s overdue for a big earthquake. If the ground shifts suddenly, it could trigger a giant wave.
2. Melting Glaciers in Alaska:
As glaciers melt, slopes become unstable. If a chunk of land falls into the ocean, it could cause a tsunami like the one in Lituya Bay in 1958, which reached a staggering 1,700 feet high!
3. Volcanic Collapses in Hawaii:
Volcanoes can collapse during eruptions, causing huge waves to rush toward the islands and beyond.
How Bad Could It Be?
- Waves as tall as 1,000 feet could hit the West Coast.
- Cities like Seattle, Portland, and even parts of California could be at risk.
- Such a wave would hit fast—leaving little time to evacuate.
Has This Happened Before?
Yes! In 1958, a landslide in Alaska’s Lituya Bay caused a wave that was over 1,700 feet high—washing away everything in its path.
What Should We Do?
- Better Warning Systems: Scientists want more advanced tsunami alerts so people can get to higher ground in time.
- Stronger Infrastructure: Buildings, bridges, and roads need to be prepared for these rare but devastating events.
- Community Preparedness: Coastal towns need solid evacuation plans and community drills.
A mega-tsunami hitting the U.S. is rare, but it’s not impossible. With a 15% chance of a big earthquake in the next 50 years along the West Coast, experts say it’s smart to prepare. Better warnings, stronger buildings, and knowing what to do in an emergency could save lives if the unthinkable happens.