[Geysers] Ott Shoshone Geyser Basin

[jacross]

Feature 1 is Rosette Spring.  The other features not identified by Dave 
Schwarz lack names.

Union, sadly, has been dormant since 1978.  I was momentarily elated to see 
your caption "Union Geyser eruption."

Here is some data from Rocco's Transactions III paper that addressed Union's 
historical activity:

Time from 1st eruption in series to the 2nd: 3.02 hours (8 data points).
Time from 2nd eruption in series to the 3rd: 7.30 hours (4 data points).
Average length of water phase, central cone: 7.0 minutes.
Average length of water phase, north cone: 10 minutes.
Average length of entire show, water + steam phase: 43 minutes.

The entire show is thus about 20% water phase and 80% steam phase, which is a 
pretty large difference.

Note also that upon reading the data Rocco presents in the paper, although the 
data are understandably sparse, given Union's remote location, they span 104 
years from 1872 to 1976, with very little change.

Jeff Cross
jacross at lamar.colostate.edu