By Lynn Stephens with additions
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Geyser Log abbreviations
ie      in eruption (wasn't observed at start)
d       duration
I       interval
h       height
"3h45m15s        ""3 hours, 45 minutes, 15 seconds (for instance)"""
>       greater than
<       less than
~       approximate(ly)
IP      Report is from within YNP
e       electronic time
cam and wc  time from webcam
swc    streaming web cam
ns     observed near start
ne     observed near end
vr     visitor report or time from a watch not verified with correct time

Grand Codes:

G     Grand initiated the eruption
T      Turban started before Grand
*       long 2nd burst (d>1m15s)
#       long 3rd burst (d>1m15s)
Vent & Turban after
C       Continue
Q       Quit