Norris Geyser Basin
There is only one predicted geyser at Norris Geyser Basin, Echinus Geyser. Echinus Geyser's predictions are posted at the Norris Museum. Most of the time, Echinus is the star performer at Norris.
Echinus Geyser has been a real crowd pleaser. (Unfortunately, it didn't always live up to its reputation in 1998, when it had many aborted and wimpy eruptions. As of February 1999, Echinus was being described as fairly weak and erratic. Intervals were close to 90 minutes, durations were around 4 minutes, and maximum heights were only about 35 feet. Eruptions were preceded by about 20 minutes of overflow. Hopefully, it will improve later in 1999 but that may just be a pipe dream. Echinus has been known to change its character and strength greatly over the history of the park. We appear to be observing one of these changes.) When playing well, it is not uncommon to hear first time observers comment that they've enjoyed Echinus more than Old Faithful. It is possible to get closer to Echinus than to any of the other predicted geysers. This coupled with the wildly bursting play of Echinus makes it a treat to watch.
Echinus is a fountain-type geyser. Its maximum height is about 80-125 feet but most bursts are less than this. Its duration ranges from a minute to over an hour, though, most eruptions last between 5 and 15 minutes. Its intervals range from 20 to 80 minutes. Given Echinus Geyser's great show and its relatively short interval, it is worth waiting for even if you don't know the next prediction.
Echinus is the largest frequently active acid geyser in the world. Unlike most geysers in Yellowstone and around the world which tend to be alkaline in nature, Echinus, along with most of the other thermal features at Norris Geyser