I became fascinated with geysers that form blue bubbles at the start of their eruptions. These consist of a doming up of the water before turning to a normal geyser eruption. Botryoidal Spring became a geyser in 1996 when I first noticed its amazing bubble shapes. Using the same camera techniques as for mudpots, similar surface patterns were revealed. Here’s a more recent example taken a half second into the eruption. My new book, Unusual Geysers, is about these geysers. An animation of a similar eruption is shown at www.mudpot.com. Spanning two seconds, its water rises, creates a bubble. then turns to spray.
Jack Hobart