On 29 March 1982, a big volcano in southern Mexico named El Chichón blew up. Don't miss Erik Klemetti's recap of this important event for volcanology, for Wired Science. Among the reasons it was important was that it came basically without warning and that it released an outsized amount of sulfur gases, which cooled the globe significantly. These made its eruption a global wake-up call, informing us that volcanoes can surprise us and that they can have effects on the whole world. Erik has also posted a look at the possible future doings of El Chichón.