Activity Underwater News Today

Recent months because of a high tide saturday night and also a full moon. natalie and george? >> such a very powerful volcano. its a menace to people in that area, of course. but no one expected this. were about to talk more about it. ivan, thank you. >> again, a tsunami sparked by a volcanic eruption. lets get the very latest now from our derek van dam. >> george, usually tsunamis are formed by the displacement of water, triggered by things like earthquakes, shifting tectonic plates, landslides...