Top photo: Great Fountain eruptive burst; Lower left photo: Great Fountain at sunset; Lower right photo: Great Fountain small eruptive burst with white dome erupting in the back ground.
| Name | Interval | Duration | Height |
| Great Fountain | 9-11 hrs ave. Intervals as short as 7 hours and as long as 14 hours have been reported . | 40-70 mins, 60 mins common. | Up to100 feet with super- bursts to150 feet. Super-bursts as high as 230 feet have been reported. |
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Copyright © 1996, 1997 [Gregory L. Jones]. All rights reserved.
Revised: 03/16/06