GEOLOGY

Detailed explanation-1: -A man named Pliny the Younger was in a town 30 kilometers west of Mount Vesuvius and wrote a detailed account of what he saw happen in a letter. This is said to be the first written description of a volcanic eruption, and many regard Pliny the Younger as the first to discover volcanoes.

Detailed explanation-2: -Catherine Joséphine “Katia” Krafft (née Conrad; 17 April 1942 – 3 June 1991) and her husband, Maurice Paul Krafft (25 March 1946 – 3 June 1991) were French volcanologists and filmmakers who died in a pyroclastic flow on Mount Unzen, Japan, on 3 June 1991.