Mike Poland, the scientist-in-charge of the Yellowstone Volcano Observatory (YVO), provides this November update from a very snowy Norris Geyser Basin with a story about Porkchop Geyser’s 1989 explosion. Porkchop Geyser was named in the 1960s because it had a shape that looked a lot like a pork chop. In the 1970s to 1980s, it started having intermittent geyser eruptions, becoming more and more active. On Sept. 5, 1989, Porkchop Geyser exploded. The vent for the geyser became so constricted that