An opening or rupture in the earth’s surface through which lava, hot gases, and fragments of rock erupt. The effect of volcanic eruptions on humans is both direct—lava flow, tidal waves, mud slides—and indirect—releasing ash that affects the lungs or weather
According to Cayetano, Southeast Asia is one of the most geologically active regions, of the world, if not the most, and had been home to the most destructive and powerful volcanic eruptions in history.
A group of experts from the Institution compiled the report in response to the problems caused by the volcanic eruption. More than 100,000 flights were grounded in 33 countries and five million passengers were stranded around the world.
I READ somewhere that a major volcanic eruption in Iceland, which preceded by a few years the French Revolution (from July 1789), may have been in part one cause of that violent political upheaval, due to the adverse effect on harvests in France and so further increasing the poverty of the peasantry.