Rockfall The earthquake caused a subaerial rockfall in the Gilbert Inlet. Over 30 million cubic meters of rock fell from a height of several hundred meters into the bay, creating the megatsunami. The impact of the rockslide included the creation of wave run up that shaved up to 400m of ice off the front of the Lituya Glacier and eroded or completely eradicated its rocky deltas. After the earthquake it was observed that a subglacial lake, located northwest of the bend in the Lituya Glacier at the head of Lituya Bay, had dropped . This proposed another possible cause to the production of the wave which caused destruction as high as above the surface of the bay as its momentum carried it upslope. The wave caused damage to the vegetation up the headlands around the area where the rockfall occurred, up to a height of 524 meters, as well as along the shoreline of the bay. It is possible that a good amount of water drained from the glacial lake through a glacial tunnel flowing directly in front of the glacier, though neither the rate of drainage nor the volume of water drained could produce a wave of such magnitude. Even if a large enough drainage were to take place in front of the Gilbert Glacier, the run-off would have been projected to be on the opposite side in Crillon Inlet. After these considerations it was determined that glacial drainage was not the mechanism that caused the giant wave. Megatsunami The Lituya Bay tsunami caused damage at higher elevations than any other tsunami, being powerful enough to push water up the tree covered slopes of the fjord with enough force to clear trees to a reported height of . A total of 5 people were killed during the tsunami, which left many people injured and many homes destroyed. Two people from a fishing boat died as a result of being caught by a wave in the bay. Two more individuals, a fishing boat captain and his seven-year-old son, were struck by the wave and lifted hundreds of feet into the air by the swell. Remarkably, both survived with minimal injuries. In Yakutat, the only permanent outpost close to the epicenter at the time, infrastructure such as bridges, docks, and oil lines all sustained damage. A wave tower collapsed and a cabin was damaged beyond repair. Sand boils and fissures occurred