🚨 Alert: Megathrust Zone - The Cascadia Fault Is Overdue We worry about the San Andreas, but the fault that can change the map is Cascadia, a 600-mile megathrust off Washington and Oregon. Scientists train for a Magnitude 9.0 event that can shake Seattle and Portland and send a local tsunami racing toward the coast in about 15 minutes after the shaking stops. 🌊 What history tells us: in 1700, Cascadia ruptured at ~M9.0 and launched a Pacific-wide tsunami recorded in Japan. USGS, NOAA, and stat
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