[Geysers] Geyser Report 11/29 through 12/04

[Mike Keller]

Some stuff from the UGB-

 

Plume is dormant.  There is snow and ice near the crater implying it has not
erupted in some time.

 

Beehive is erupting at least once a day.

 

Lion, Aurum, and Depression are active.

 

Little Anemone is still active.

 

Sawmill continues to dominate the Sawmill Group.

 

Grand is erupting at near 7 hour intervals.  All observed eruptions have had
one or two bursts.  There are new vents breaking out along the hillside once
again in the area where "Sputnik" Geyser once was.  Right now there are two
"wok like" craters which erupt with West Triplet and Rift to a couple of
feet.  This area started heating up in late summer.

 

Daisy is erupting every 2-3 hours, depending on the wind.  There is no
evidence Splendid erupted while I was away.

 

I am seeing Oblong once a day, but am sure it is erupting more often.

 

Giant is having good hot periods at least once a day, with many smaller ones
in-between.  Smaller hot periods (lasting 2-5 minutes) are coming every 1.5
to 4 hours or so and the bigger ones (lasting 7+ minutes) seem to be coming
every 15-24 hours.  The best surging I have seen from Mastiff has reached
about 6 feet, with most surging reaching 1-3 feet.

 

Grotto had a marathon on 12/01 then did something odd.  On 12/03 I saw
Grotto at 0858ns.  At 1310, Spa was seen ie.  At 1808, Grotto was still ie.
When I went into the basin on the morning of 12/04, Grotto was 0906ie.  Spa
was empty.  Grotto erupted all day on 12/04, with Spa not starting until
1630.  When Spa started, it looked like the kind of Spa you get when it
starts a 2nd time in a marathon, normally around the 16-19 hour mark.  If
this is true, then the marathon on 12/04 began around 0000.  Even if Grotto
stopped right after I left it at 1808 the night before, it shouldn't have
started another marathon eruption only 6 hours later.  If this was the same
marathon I saw on 12/03, the duration was in excess of 34 hours.  At 2035 on
12/04, Grotto was off.  The small vent across the river from Oblong was
intermittent all day on 12/04, which would indicate Grotto had been in
eruption a long time.  However, Giant had a hot period around 0800 on 12/04.
If Grotto was still in eruption from the day before, this hot period took
place about 25 hours into the marathon, something I have never seen.  For
the remainder of the day on 12/04, Bijou and Giant were dead and looked like
they normally do during a marathon of Grotto.

 

Closed intervals on Riverside have varied from 5h 52m to 6h 22m.

 

Fan and Mortar erupted between 1700 and 2040 on 12/04, for a rough interval
of 6 days.  In the days leading up to this eruption, there were a number of
events with eruptions of "Bottom Vent", River Vent pauses, and heavy
splashing from Fan's Main Vent.

 

MK

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