[Geysers] Recovery of Rotorua

[TSBryan at aol.com]

Hi, All:

This is really addressed to Brad and/or Ashley, who I hope will be able to 
respond to the geysers list...

The article in Geothermics 34 (2005) p. 161-185 is excellent. I especially 
remember my visit to Rotorua back in June 1993, when I was toured around Whaka 
by Ron Keam and Ted Lloyd -- I can never forget Ted's exclamation of "It's a 
geyser, and actual geyser!" when we encountered eruptions near Roto-a-Tamaheke. 
That was evidently a function of increasing water levels there, so I find (as 
do the authors) the current decrease rather curious.

All that aside, though, I write because of the time series plots of Figures 2 
and 14 in the article. Maybe I missed this answer during my first reading fo 
the article, but the plots show a very clear annual variation in water levels 
superimposed on the general increase, the levels generally peaking around 
January 1 (USA folks remember that's early summer in NZ). Is there a simple 
explanation for this?

And "while I've got you here," any geyser news from Orakei Korako, Waiotapu, 
Waimangu, etc?

Thanks.

Scott Bryan
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