[Geysers] North Goggles data on GOSA web site

David Schwarz david.schwarz at alumni.duke.edu
Tue Feb 14 18:34:03 PST 2012

   Briefly, those are actually:

   A series of 5, a series of 4, and a series of 2 on June 29-30, 2000.

   A series of 1 and a series of 8 on July 22, 1994.

   Longer explanation:

   In the '90s, the rule of thumb was that North Goggle majors were
exceedingly rare, but series of minors tended to start within two or three
hours after a Lion series.  The related extended overflow (see next
paragraph) often started around the time Lion would have been expected had
the Lion series continued.

   North Goggles eruptions were always preceded by an exceptionally long
overflow of 20+ minutes.  Majors occurred during the overflow--an overflow
that lasted over 60 minutes generally prompted some hope for a major.
 Minors occurred after an extended overflow ended, on a subsequent
refill--oddly, usually not the first after the extended overflow, although
the first fill _would_ usually be accompanied by some splashing and
boiling.  Once one minor had taken place, a followup (ie, part of a series)
could occur on subsequent refills, with a gap of up to two non-eruptive
refills on 10-20 minute intervals in between.

   With that in mind, here's what happened with that July 22, 1994 series,
which I wrote about yesterday but mistakenly placed in 1995:

   The geyser had a extended overflow during the Lion series the morning of
July 22, around the time of the third Lion in the series.  This was a bit
early, but not an unheard of time for an extended overflow.  The overflow
lasted long enough to give us hope for a minor, which indeed happened at

   Then things got weird.  Normally, a North Goggle minor meant that we
were done with the Lion series, so we were pretty taken aback when Lion
erupted again at 11:29.  We were even more taken aback when North Goggle
refilled and immediately went into another extended overflow--sort
of--starting sometime around 11:40.  I say "sort of" because the water
level stayed high but well below overflow, pulsating the way it does when

   This non-overflow was quite long.  Unfortunately, my note-taking
discipline as a teenager wasn't what it could have been, so I can't tell
you how long, but it was long enough that North Goggle started boiling and
doming the way it does when it's building up to a major.  Well over an
hour.  Just when it was looking really promising, it unceremoniously
drained out of sight.

   Within a minute or two, both North Goggle and Goggles Spring starting
loudly rumbling and thrashing at depth.  Both splashed visibly within their
craters from a very deep water level, even putting some spray and droplets
over their rims.  After an unusually long recovery, they refilled, boiled
heavily, and failed to erupt, so we wandered off to Giantess, which was
having impressive and frequent boils that day.

   From Giantess, we saw the first North Goggle eruption of the new series.
 It's slightly possible that we missed an eruption or two in some of the
longer gaps in the data because we really weren't expecting any more after
three or four and kept wandering off.  Once we decided to settle and keep a
close eye on it, it had one more eruption and then visibly cooled off
(stopped boiling during overflows).  Lion started a new series shortly

   At the time this was by far the longest series of the 1993+ active
phase, and the only time that a series lasted essentially until the next
Lion series.

   I wasn't there in 2000, but that data looks very clearly like three
1990's-style series.  The Lions at 1824, 0233, and 0856 are initials, as
almost certainly are the corresponding North Goggles at 2355, 0605, and
1235.  At 5 eruptions, the first series is still remarkably long.  It's
also remarkable, at least by the standards of the 1990s, how close the last
eruptions of the first and second series came to the subsequent Lion

David Schwarz

On Tue, Feb 14, 2012 at 5:08 PM, Graham Meech <meechg at verizon.net> wrote:

> Dave asked if there had been similar North Goggles activity in the past so
> I
> looked at the data on the GOSA site that Lynn Stephens, Mary Beth Schwarz
> and Marion Powell have compiled covering 2010-1992, 1981, 1979-1975, and
> 1973-1970 (http://gosa.org/ofvclogs.aspx).  Thank you to everyone that
> reported the times, to Lynn, Mary Beth, and Marion for compiling the data,
> and to GOSA for hosting it on the web site.
> The two best series were 11 eruptions on 29-30 June 2000 and 9 eruptions on
> 22 July 1994.  Other years had up to 5 eruptions reported on a single day
> with mostly single eruptions reported.  All but one eruption logged in
> these
> two days were between Lion series (if we assume the Lion reports are
> complete).  All the Lion and North Goggles eruptions for these days are
> shown below.
> 6/29/2000       Lion    10:58   ie
> 6/29/2000       Lion    12:14
> 6/29/2000       Lion    18:24   ns
> 6/29/2000       Lion    19:47   ns
> 6/29/2000       Lion    21:00           d~3 1/2m
> 6/29/2000       North Goggles   23:55
> 6/30/2000       North Goggles   0:25                    minor
> 6/30/2000       North Goggles   1:12            0:47    minor
> 6/30/2000       North Goggles   1:52            0:40    minor
> 6/30/2000       North Goggles   2:23            0:31    minor
> 6/30/2000       Lion    2:33
> 6/30/2000       Lion    3:55
> 6/30/2000       North Goggles   6:05                    minor
> 6/30/2000       North Goggles   6:50            0:45    minor
> 6/30/2000       North Goggles   7:28            0:38    minor
> 6/30/2000       North Goggles   8:13            0:45    minor
> 6/30/2000       Lion    8:56                    initial
> 6/30/2000       Lion    10:10
> 6/30/2000       North Goggles   12:35                   minor
> 6/30/2000       North Goggles   13:19           0:44    minor
> 6/30/2000       Lion    18:24                   initial
> 6/30/2000       Lion    19:45           1:21
> 7/22/1994       Lion    3:53    ie
> 7/22/1994       Lion    9:04
> 7/22/1994       Lion    10:05                   minor
> 7/22/1994       Lion    10:26
> 7/22/1994       North Goggles   11:20
> 7/22/1994       Lion    11:29
> 7/22/1994       Lion    12:42                   d < 15s
> 7/22/1994       North Goggles   13:21
> 7/22/1994       North Goggles   14:28
> 7/22/1994       North Goggles   15:00
> 7/22/1994       North Goggles   15:45
> 7/22/1994       North Goggles   16:21
> 7/22/1994       North Goggles   17:11
> 7/22/1994       North Goggles   18:11
> 7/22/1994       North Goggles   ~18:37
> 7/22/1994       Lion    19:56                   initial d > 6
> 7/22/1994       Lion    21:12
> On 6/30/2000 there are some long intervals which could be gaps in
> observation (especially after 0223) so there may have been extra eruptions
> not logged.  Both of these events were in the summer when people would have
> been around though, so the record might be complete.
> No Giantess eruptions on either day.  Interestingly, on both days there was
> a series of false indicators.  In 1994 there was also a Ledge eruption that
> day and an Aurum afterburst reported!
> Graham Meech
> _______________________________________________
> Geysers mailing list
> Geysers at lists.wallawalla.edu
-------------- next part --------------
An HTML attachment was scrubbed...
URL: </geyser-list/attachments/20120214/ecd5f615/attachment-0001.html>

More information about the Geysers mailing list