Super-eruptions: Volcanic Activity with a Global Impact; Stephen Self, Volcano Dynamics Group, Department of Earth Science, The Open University, Senior Volcanologist, US NRC - Every now and again, Earth suffers from tremendous explosive volcanic eruptions, much bigger than those witnessed in modern times. Although the return period for such events is long, perhaps every 10-100,000 years depending on the size, it is statistically more likely that Earth will next experience a large...