2015 Event Scientists discover a huge magma reservoir under Yellowstone National Park that feeds the magma chamber heating the park's geothermal features; though no volcanic eruption is likely for thousands of years, such an event would dwarf all others to date 1959 Event 7.1 quake strikes Yellowstone National Park 1877 Event Nez Perce-indians flee into to Yellowstone National Park 1872 Event Yellowstone becomes world's 1st national park
