Old Tardy Geyser
can seem dormant if viewed after an eruption, as the vent is empty, surrounded by a 12 foot band of dry-looking grey/white sinter, lacking any flow-over pools or colorful run-off channels. But the geyser does erupt quite frequently, usually for just a few minutes but sometimes for several hours. The time between eruptions also ranges from hours to minutes, and the maximum water height is around ten feet.
Back to map of the Upper Geyser Basin