A couple of reference photos from the Digital Slide File, which clearly show that the small vent is the major eruptive vent: http://www.nps.gov/features/yell/slidefile/thermalfeatures/geysers/westthumb/Images/05381.jpg http://www.nps.gov/features/yell/slidefile/thermalfeatures/geysers/westthumb/Images/11083.jpg Note the larger "pressure pool" drained in the foreground of both photos. David Schwarz On Tue, May 20, 2014 at 8:08 PM, Michael Goldberg <goldbeml at ucmail.uc.edu>wrote: > On May 14, Ryan Maurer reported seeing eruptive activity from Lakeshore. > Here is his description attached to the observation at 09:17 (copy/pasted > from GeyserTimes.org). > > "Intermittent boiling from the main vent every 30-40s, one of these > built into a violent boiling to a foot to a foot and a half with droplets > and splashes to 2-3ft. Dropped to boiling 6-9inches and pumping out a LOT > of water after a few seconds or so of the big stuff. Eruption stopped and > the intermittent surges became less frequent and less powerful. Saw no > more steam from it ten-fifteen later." > > [I'd be interested to know which hole is the "main vent" in this recent > activity. If I remember correctly from old pictures, past eruptions came > from the smaller lakeward vent.] > > Michael Goldberg > Michael.Goldberg at uc.edu > > > On Sun, 18 May 2014, Leslie wrote: > > For the several minutes I was there around 10:20 a.m. MDT today (Sunday, >> May 18th), the larger vent of Lakeshore Geyser was in a continuous boil >> that reached six to eight inches in height at times. The smaller vent was >> quiet. >> Leslie Quinn >> >> _______________________________________________ >> Geysers mailing list >> Geysers at lists.wallawalla.edu >> >> >> _______________________________________________ > Geysers mailing list > Geysers at lists.wallawalla.edu > > -------------- next part -------------- An HTML attachment was scrubbed... URL: </geyser-list/attachments/20140521/f9db2ec2/attachment-0001.html>