Around the world, over 600 million people live near one of 1500 active terrestrial volcanoes. Who's keeping them safe from potential future eruptions? The women and men who study these gas-and-ash-and-lava belching windows into the center of the earth: volcanologists.
You might not be sure what volcanologists do or why they matter—especially if you live thousands of miles away from one of these fiery mountains. So, Mental Floss went searching for answers from four volcanologists working in various capacities around the country, who shared their experiences in the field, under the ocean, and gazing far out into space.
1. THEY STUDY EVERYTHING FROM MAGMA COMPOSITION TO VOLCANIC GASSES AND BEYOND.
Source : http://mentalfloss.com/article/533613/job-secrets-of-volcanologists169