GEOLOGY

Detailed explanation-1: -In the deep ocean, tsunamis can move as fast as a jet plane, over 500 mph, and can cross entire oceans in less than a day. As the waves enter shallow water near land, they slow to the speed of a car, approximately 20 or 30 mph.

Detailed explanation-2: -The tsunami waves that struck Palu are estimated to have travelled at up to 800kmh.

Detailed explanation-3: -Tsunami facts A tsunami can be triggered by a large, high energy, but relatively short duration disturbance of the sea floor. Such waves can travel across the ocean at high speed (800 km/h, the speed of a jet plane).

Detailed explanation-4: -A second boat in the middle of the bay survived. Their vessel smoothly carried them 80 feet high over the wave’s crest. As the tsunami continued to power through the Bay at 100 miles an hour, it pushed a third boat through the opening into the Gulf of Alaska. Millions of trees were pulled from their roots as it passed.