Hawaii’s Mauna Loa, world’s largest active volcano, starts to erupt for first time in nearly four decadesHawaii’s Mauna Loa eruption is spewing volcanic ash and debris nearbyThe world’s largest active volcano, Hawaii’s Mauna Loa, has started to erupt for the first time in nearly four decades, prompting volcanic ash and debris to fall nearby, authorities said Monday.The eruption began at approximately 11:30 p.m. Sunday in Moku‘āweoweo, the summit caldera of the Mauna Loa volcano, inside Hawai‘i Volcanoes National Park on the Big Island.Portions of the Big Island were under an ashfall advisory issued by the National Weather Service in Honolulu, which said up to a quarter-inch of ash could accumulate in some areas.Mauna Loa is one of five volcanoes that together make up the Big Island of Hawaii, which is the southernmost island in the Hawaiian archipelago.Mauna Loa, rising 13,679 feet above sea level, is the much larger neighbor to Kilauea volcano, which erupted in a residential neighborhood and destroyed 700 homes in 2018."