Oftentimes, a tsunami wave in the ocean will be little more than a foot tall. The energy in the water lies underneath the current and is travelling over 100 miles-per-hour. Once that energy hits the shore of land, it pushes the water higher and higher into the air.
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If the point was between north and east it would be northeast.
The European settlement in the Americas was devastating to the indigenous populations. It is thought that the native population was reduced by as much as ninety percent in the first century after first contact as the result of diseases inadvertently introduced from Europe.