[Geysers] Frill Spring

[jacross]

Frill Spring's activity has changed substantially.  Whereas it used to have 
8-9-hour long series of eruptions every 4-5 days, the automatic data logger 
record shows that it is now having series of only a few eruptions.  These 
series come more frequently than before, but are also much shorter.  All 
series are preceded by about 40 minutes of heavy overflow.

There seems to be no relationship between the strength of the intermittent 
overflows between series and the time when the next series starts (this from 
15 years of experience).  I am guessing that, like North Goggle Geyser, one of 
the overflows simply continues for 40 minutes and then the series starts.

Jeff Cross
jacross at lamar.colostate.edu