In a message dated 3/20/2005 19:57:40 PM Pacific Standard Time, jacross at lamar.ColoState.EDU writes: I think that a study of the seasons' effects on geysers would be much more informative. Aurum Geyser responds to groundwater levels, -snip- and I am sure there are quite a few other examples. Yes, such as the Disturbance (a.k.a, the Seasonal Disturbance) at Norris. I still contend that a similar, though more subdued process takes place in the Upper Basin... As for the tidal business, difficult for sure -- but let us not forget that negative results can yield strongly positive conclusions. Scott Bryan -------------- next part -------------- An HTML attachment was scrubbed... URL: </geyser-list/attachments/20050321/06e323dc/attachment.html>