Approximately two years before the Yellowstone Supervolcano erupted, a new lava dome formed under Coffee Pot Springs. It, along with the one at Sour Creek caused a series of magnitude 5.0 to 5.5 earthquakes. Yellowstone continued to be studied by a team of geologists led by Larry Skrtel of the US Geological Survey. About year before eruption, this team discovered that Coffee Pot Springs had "gone nuts": a brand new geyser threw water a hundred feet into the air and springs were no longer just pools but blorping boiling water 8-10 feet high along with new, agitated springs forming.