[2banana]

Usually with large earthquakes, there are many strong aftershocks.

With a 9.0 earthquake, a strong aftershock could cause another large tsunami.

Better to be vigilant...

[Brilliant]

Agreed.

I saw an interesting bit on OReilly last night. His guest was a physics prof who was making the argument that a massive tidal wave could hit the US east coast, if a volcano off the coast of Africa should blow up, as they apparently fear.

It could devastate the entire east coast. The only saving grace is that it'd take 9 hours to get here, so there would at least be time to evacuate the people.

[Strategerist]

With a 9.0 earthquake, a strong aftershock could cause another large tsunami.

Actually that's pretty unlikely. I've never heard of an aftershock tsunami days after the main quake for a megathrust quake like this.

There's been one M 7+ aftershock, and that quake was still 100 times weaker than the main shock. Long-distance tsunami are very rare for quakes smaller than 8s, and it's extremely unlikely you'll have any aftershocks above 8. You certainly won't get any large tsunami out of these M 5-6 quakes.