Yellowstone Thermal Volunteer Page

The data contained on these linked pages has been collected by Lew and Jan Johns while official volunteers at Yellowstone National Park.   The analysis of the data is ours.  Please credit us and the National Park Service when using this information.  The data files are downloadable as tab-delimited spreadsheets.

Grotto Geyser

•     Picture
•     Report
•     Data 1995
•     Data 1996
•     Data 1997
•     Scatterplot Chart 1995
•     Scatterplot Chart 1996
•     Scatterplot Chart 1997
•     Scatterplot Chart 1995, 1996, 1997
•     Histogram 1995
•     Histogram 1996
•     Histogram 1997
•     Histogram 1995, 1996, 1997

Lew Johns        Jan Johns
jjohns@shol.com