[Geysers] Geyser Report: Giant/Grotto, May 26-June 1

[Steve Robinson]

I have a little to add to this. On Tuesday morning when I went down to 
Giant. Bijou was on strong, but no apparent hot period had occurred. I had 
observed Bijou from 0530 till the hot period at 0811. Instead of Bijou 
weakening after a hot period until it was hard to tell if it was on, in a 
slowdown or  a shutdown as was typical for my prior 10 days observation, 
opening weekend and closing weekend last fall, Bijou was on fairly strong 
right up to the hot period at 0811 with regular slowdown and shutdowns. 
Something in the Giant complex has changed in my opinion. I am not saying 
that this is good, bad or indifferent, just a change.

The recovery hot period on June 1st was at:
2024 d=4:02 Mastiff surge to just 1 foot in the first minute of the hot 
period. India was safe.

June 2nd
0617 Grotto Fountain
0620 Grotto
0648 Giant hot period, d=2:50 Feather and the SW vents were the only vent 
involved. Mastiff only overflowed a little, India was safe again

Steve Robinson



At 03:20 AM 6/3/2005, you wrote:


>A message from Tara Cross <fanandmortar at hotmail.com> 6/3/05
>
>This is a summary of events in the Giant/Grotto area for May 26-June 1.
>This is all based on notes and my memory; if I left something important 
>out, I would welcome additional information.
>
>May 26
>
>0631ie Grotto (marathon, duration around 22 hours, give or take)
>0742ie Rocket major
>
>May 27
>
>0910 Giant hot period, d=10m20s.  First after marathon; Mastiff surging to 
>4 feet, India completely covered.
>1510 Giant hot period, d=6m.  Mastiff surging to 1-2 feet.
>1625ie Grotto Fountain
>1636 Grotto
>
>The first Grotto after the marathon was--yes--another marathon, duration 
>unknown.  Grotto was still erupting when Kitt left Grand around 2230, but 
>was long done when the first gazers made it out the following morning.
>
>May 28
>
>0701 Giant hot period, d=2m50s.  Probably not the post-marathon hot period.
>0926 Giant hot period, d=3m50s.  Feather & Feather Satellite, but no 
>Southwest Vents.
>1240 Giant hot period, d=9m30s.  Nice Mastiff surging to 4 feet, India 
>completely covered.
>1639 Grotto
>1650 Giant hot period, d=7m50s.  Mastiff boiling to 1 foot, India 2/3 covered.
>2014 Giant hot period, d=8m56s.  Mastiff to 18 inches, India 2/3 covered.
>
>May 29
>
>0704 Giant hot period, d=7m40s.  More droolage.
>1040 Giant hot period, d=7m25s.  Even more droolage; Mastiff barely boiled 
>at all and India was dry.
>
>I somehow missed writing down the Grotto that was in progress for these 
>two hot periods, but it also turned out to be yet another marathon, after 
>only two normal Grotto eruptions.
>
>May 30
>
>1202 Giant hot period, d=10m15s.  This hot period was the real deal.
>Mastiff surged to 4-5 feet in the first few minutes and then to 2-3 feet 
>later on.  At the end of the hot period and continuing after Feather had 
>stopped, Turtle splashed to 1-2 feet.
>1732ie Giant hot period, d>5m.  Mastiff surging to 1-2 feet.
>1845 Grotto Fountain
>1859 Grotto
>2045 Giant hot period, d=8m50s.  Mastiff to 2 feet maximum.
>
>May 31
>
>0811 Giant hot period, d=8m55s.  India was about 2/3 covered, but Mastiff 
>never boiled to more than a few inches.
>0849 Grotto Fountain
>0852 Grotto
>0951 Bathtub.  The Southwest Vents sputtered but Feather did not start.
>1250 Giant hot period, d=8m58s.  Mastiff surging to 4 feet early in the 
>hot period, then 2-3 feet later on.  India was completely covered.
>
>When we left the area, Grotto Fountain was boiling.  I never heard a start 
>time on Grotto but it was i.e. when I returned from the Lower basin a 
>little before 1500.  And, as if I hadn't gotten enough Grotto over the 
>weekend, this was another marathon.
>
>1709 Giant hot period, d=8m04s.  Mastiff to 3 feet, India 3/4 covered.
>
>June 1
>
>Grotto finally quit around 1230 for a duration of roughly 23 hours.  I 
>left the basin before the post-marathon hot period.
>
>My general observations are that while there were bona fide "strong" hot 
>periods mixed in, the longer durations seen on the 28th and after weren't 
>really indicative of more energy on the platform.  Note the total lack of 
>durations under 5 minutes after the 28th.  It was almost as if Giant 
>wanted to have one long hot period that expended roughly the same amount 
>of energy as two weak ones.  "Mastiff is flat but still overflowing" 
>became a very common call for the latter part of the weekend--at least 
>when Grotto WASN'T in marathon.  Based on some rough extrapolations, there 
>were zero, 2, and 2 Grotto eruptions, respectively, between the 4 
>marathons I saw.  As encouraging as the recovery hot periods were, this 
>still doesn't strike me as a good formula for Giant eruptions.
>
>I shall refrain from further prognostication.
>
>- Tara Cross
>fanandmortar at hotmail.com
>
>
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