- ... that the Cameroon line of volcanoes is 1,000 kilometres (620 mi) long, and includes Mount Oku, the second highest mountain in Cameroon?
- ... that there was intense volcanic activity in Uruguay during the Cretaceous period about 130 million years ago?
- ... that seismologist Fusakichi Omori (pictured) of the Imperial University of Tokyo, who mapped the effects of the 1906 San Francisco earthquake, later designed and donated the equipment to found the Hawaiian Volcano Observatory?
- ... that Heart Peaks in northern British Columbia, Canada, is the third largest volcano in the Northern Cordilleran Volcanic Province?
- ... that Green Seamount, an underwater volcano, could have taken up to 260,000 years to reach its present height?
- ... that both the Pole Creek Wilderness and North Fork Owyhee Wilderness have some of the largest concentrations of sheer-walled volcanic rhyolite and basalt canyons in the western United States?
- ... that volcanologist Harry Glicken was saved from the 1980 eruption of Mount St. Helens due to a scheduling conflict, only to die in the eruption of Mount Unzen in 1991?
- ...that the eruption of Pu'u 'O'o added 544 acres (2.2 km²) of land to the island of Hawaii?