Volcano Erupts in Canary Islands, Prompting Mega Tsunami Fears

In short, there is a massive slab of rock on the side of the volcanic island that, if shaken loose, could slide into the sea. If that happens, it will rapidly displace a vast volume of ocean, sending a monster tsunami across the sea. Over the years estimates of such a tsunami have risen to up to hundreds or even thousands of feet high when the wave strikes the east coast of the US (though more realistically it would likely top out at around a hundred feet). And it would strike the *entire* east coast of the US. It would also trash Spain, Portugal, parts of France, Ireland and Britain.