A miner, Budiono (63) is seen showing his shoulder, which suffered skin and bone injuries from carrying a heavy load of sulfur stalactites in the crater of the Ijen volcano in East Java, Indonesia. Photo taken on October 21, 2016. Based on data from the US Geological Survey, about 1,350 potentially active volcanoes are spread throughout the world, 75 percent of which are located along the Pacific Ring of Fire as an area that stretches across land boundaries in the Pacific Ocean. The data concludes, if earth is a repository of volcanoes that endanger as many as 800 million people who activited within a 100kilometres radius as volcano hazards zone. Since 1968, hundreds people of them known have worked be the sulfur miners in the Ijen volcano crater as the most dangerous workplace in the world. A typical sulfur miner earns an average of $10-25 per day from gathering 75-250 kilograms of sulfur, explained the miners Arifin (52) and Budiono (63) which only have one work choice. Based on historical records the Ijen eruption had erupted for several weeks in 1817 throwing volcanic ash and continued eruption on 2014, and then last eruption on 2018 resulting in 30 people being contaminated with toxic gas and hundreds of people being displaced on 2018. Now, Volcanology and Geological Hazard Mitigation Center intensively to observed the Ijen volcano activity as fontire guard. At the other side, Ijen volcano has an beautiful nature geological tourists value as the blue glow light of sulfur gas which spewed from volcano body cracks were contacted with the oxygen, as well as a panoramic view of Lake Ijen with its green water due hydrochloric acid. Photo by Aditya Sutanta/ABACAPRESS.COM