[Geysers] Geyser Report--Stephens (8.2

[Mike Keller]

The overflows from Seismic are typical of what it has been doing for the
past 2-3 years.  With these overflows "Aftershock" is boiling up to a foot
or two.  While there are heavy waves on Seismic, I have not seen any
eruptions from it since 1997.

MK

-----Original Message-----
From: geysers-bounces at wwc.edu [mailto:geysers-bounces at wwc.edu] On Behalf Of
lynn stephens
Sent: Tuesday, August 02, 2005 1:30 PM
To: geysers at wwc.edu
Subject: [Geysers] Geyser Report--Stephens (8.2

My analysis of  Great Fountain intervals (based on visual observations) from
May 28 through August 1 shows:

69 closed intervals
26 double intervals
1 triple interval

Mean of both the 69 closed intervals and all the intervals is 12 hours 4
minutes.  The median of the 69 closed intervals is 11 hours 49 minutes.
Intervals varied from a minimum of 9 hours 22 minutes to a maximum of 15
hour 06 minutes.

Distribution of Great Fountain intervals:
    Less than 10 hours   1%
    10h0m - 10h59m      23%
    11h0m - 11h59m      38%
    12h0m - 12h59m      14%
    13h0m - 13h59m      13%
    14h0m - 14h59m       7%
    >=15h0m              3%  

I've been watching Atomizer Geyser for the past two weeks.  (Dean Lohrenz,
Dave Leeking, and possible others recorded some Atomizer major to major
intervals in late June-early July, but I haven't finished typing the June
and July logbooks yet, so I haven't included those intervals in this
analysis.)

>From July 20 through August 2, I've recorded 3 closed intervals, 8 double
intervals, and 1 triple interval.  The overall mean interval is 14h12m.  The
longest interval is a closed interval of 15h57m.  The "shortest" interval is
a double of 26h25m, which results in one interval at least as short as
13h12m.  The proportion of "quick comeback" majors (a major happening 5 to
15 minutes after the preceding minor) continues to increase compared with
prior years.  Six (43%) of the 14 major eruptions that I've seen were "quick
comeback" majors.

Till Geyser finally exceeded the 11 hour interval mark.  Unfortunately, I
didn't get the closed interval, but the double interval of 22h08m meant at
least one of the closed intervals had to have exceeded 11h04m.

Seismic Geyser is having periodic activity in the form of heavy overflow,
which puts up an impressive steam cloud, but I haven't seen any bursting
accompany the heavy overflow periods.  The overflows have been occuring at
18-22 minute intervals, and last 1-2 minutes.

Lynn Stephens 


  
 
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