The Attica Avalanche was an avalanche that hit the Athinai Resort in the Olympus Mountains on the planet Gryphon. An overburden of fresh snow lay on a base which had been weakened and softened by sunshine warmth. Eventually, a snow cascade started to crush down on the flank of Mount Pericles down into Olympus Valley. Much of the resort was destroyed and over six hundred people were killed. Susan and Ranjit Hibson were among those buried beneath the rubble and snow.