[Geysers] Norris report 6/11

[Graham Meech]

After the visitor center called on the radios and said that Ledge had
erupted on 6/10 and was still in steam phase on the morning of June 11th I
went up to Norris for a short trip.

 

Ledge was the noisiest feature on the hillside at that time, forcing steam
from all its vents but not too vigorous.  It was dieing down by the hour.

 

Constant had single burst eruptions at intervals of 13, 23, and 11 minutes.

 

Arsenic had intervals of 7, 7, 7, 3, 3, 7, 8, 2, 6, 4, and 8 minutes (mean
5.6 minutes, range 2 - 8 minutes).  All the eruptions were weak and the
longest lasted about 1 ½ minutes.

 

Vixen was active and I watched 5 eruptions, durations 10-50 seconds (mean 33
seconds), intervals 7 – 36 minutes (mean 26.5 minutes).  The eruptions were
about 10-15’ high.

 

Veteran did not have a major eruption in 2 hours of observation.

 

Pearl was an active perpetual spouter and the UNNG across the boardwalk
erupted continuously.  The small geyser between Porkchop and the boardwalk
was in ‘rhythmic eruption’, splash pause splash pause splash pause on about
a 4 second interval.  I saw several cone walkers at Porkchop too.
Fortunately they did not break through the surface!

 

Steamboat seemed disorganized but was putting out quite a lot of water, some
minors reached the height of the trees seen from the lower platform.

 

Graham.

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