The Ilopango mega-eruption cooled the entire planet
volcano
A magnitude 4.4 earthquake was reported in the area shortly after the eruption began, according to the USGS
The 184-page details all the measures and possible impact of an eruption in the future
Alert levels for aviation are raised from "green" to "yellow," defined as a volcano "experiencing signs of elevated unrest above known background levels"
The most powerful eruption in the region is linked to the extinct volcano of Santorini, Greece
Earth's crust is literally tearing apart to form this volcanic seascape
Tamu Massif, located east of Japan, was thought to be the largest volcano on the planet
A volcano on the Italian island of Stromboli erupted on Wednesday
Scientists said the ash could have reached an altitude of 8 to 10 miles
Etna is a popular tourist destination and its eruptions, especially when seen at night, are spectacular to watch