 The lava dome likely formed before the lava flows erupted, suggested by its steep western side and the appearance of rock from the dome on the western lava flow.The dome's deep depression may have formed when the dome's top collapsed as lava moved out of the volcano during the eruption of the two flows.The human population within of West Crater is slightly more than 500 people, but more than 14,000 people live within of the volcano, and more than 2 million live within .