GEOLOGY

Detailed explanation-1: -The world’s largest eruption of the 20th century occurred in 1912 at Novarupta on the Alaska Peninsula in what is now Katmai National Park and Preserve. An estimated 15 cubic kilometers of magma was explosively erupted during 60 hours beginning on June 6th.

Detailed explanation-2: -The Mount Pelée May 8th, 1902 eruption is responsible for the deaths of more than 29, 000 people, as well as the nearly-complete destruction of the city of Saint Pierre by a single pyroclastic current, and is, sadly, the deadliest eruption of the 20th century.

Detailed explanation-3: -Pinatubo in 1991 stands as the second largest eruption in the 20th Century (Mt. Novarupta, Alaska 1912 claims largest eruption fame). Ash deposits 5 cm (2 in) thick or more covered a land area of about 4, 000 square kilometers (1, 544 squares miles) burning crops and other plant life around Pinatubo.