Steamboat Geyser Temperature Measurements, Yellowstone National ParkThis geyser is located at the eastern edge of Norris Back Basin. It rarely has major eruptions, but when they occur they are powerful. In these events, columns of hot water reach heights up to 100 meters followed by a raucous steam phase that can last for over a day, loudly discharging steam nearly 200 meters into the atmosphere. The water is neutral-to-alkaline and rich in Cl. Small ("minor") eruptions can occur every few minutes. The temperature is measured in the outlet channel downhill from the geysers vent. Steamboat has proven more active during the early 21st Century than any time since the early 1980s. Between late 1991 and 2000, there were no large eruptions. However, since May 2000, Steamboat has had 9 major eruptions, most recently on September 3, 2014. Rapid temperature increases in geyser outlet channels typically reflect increases in flow due to eruptions of the nearby thermal feature.