Tag Archives: walter trumbell

Giant Geyser is the central geyser of the Giant Group, which includes Mastiff Geyser and Bijou Geyser. In a “normal function eruption,” only Giant erupts, which means it will usually be shorter in terms of time and plume size, attaining 150 feet. Meanwhile, during a “Mastiff function eruption,” where Mastiff erupts alongside Giant (and sometimes Bijou), making Giant rocket upwards …