It takes measurable time for communities miles away from the epicentre to get hit, and in that time you could easily send a warning. Many of the videos from th

It takes measurable time for communities miles away from the epicentre to get hit, and in that time you could easily send a warning. Many of the videos from the Japan tsunami showed people getting alerted well before the quake hit. All TV stations flipped over to a warning screen with information on the quake and a map of tsunami danger areas based on computed projections. I can see how having the fault line directly under your city is a problem, but this "mega quake" is projected to originate off-shore. I guess the US solution is to keep watching Twitter.