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7,500 years ago, the Pacific floor collapsed. Massive landslides buried the seabed in seconds. Fast forward to today: robot subs have examined the place, and scans have revealed proof of at least ten distinct, cyclical megaquakes. Now, researchers warn: the plates are still locked and building pressure even today. If they start moving, that could trigger new red-alert earthquakes and send disastrous tsunamis toward the US coast. The fault is over 965 kilometers long, stretching from Northern California to Canada. It's called the Cascadia Subduction Zone. And when it snaps, the tsunami could race across the ocean at 600 mph. ---------------------------------------------------------------------------------------- ---------------------------------------------------------------------------------------- Our Social Media: ---------------------------------------------------------------------------------------- ---------------------------------------------------------------------------------------- This video is made for entertainment purposes. We do not make any warranties about the completeness, safety and reliability. Any action you take upon the information in this video is strictly at your own risk, and we will not be liable for any damages or losses. It is the viewer's responsibility to use judgement, care and precaution if you plan to replicate.