<html><head><base href="x-msg://779/"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">Many thanks to Michael, Paul, and Tara for all the F&M data. I have about ten lines of double-column space in "Yellowstone Treasures" to try to keep up with them—clearly not enough to do the subject justice!<div> </div><div>Go Fan and Mortar for 2012!</div><div> </div><div>Janet Chapple</div><div>-------</div><div> <div><div>On Dec 18, 2011, at 3:30 PM, Tara Cross wrote:</div> <blockquote type="cite"><span class="Apple-style-span" style="border-collapse: separate; font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; font-size: medium; "><div class="hmmessage" style="font-size: 10pt; font-family: Tahoma; "><div dir="ltr">I have fairly complete records of Fan & Mortar from 2000 through 2011. Here are the numbers for the 2000-2005 active phase (ok, so this is probably more detail than anyone really wanted, but since I had the numbers in front of me, I thought I'd share): First eruption:  January 2000 (missing exact date), followed by several intervals of a month or more. July 8-late October:  intervals mostly 1-2 weeks October 2000 to June 7, 2001:  intervals 3 1/2-14 days June 7, 2001 to April 8, 2003:  intervals mostly 3-7 days; longest eruption of the "spring slowdown" in 2002 was only 9d21h38m April 26-June 8:  mini-dormancy of 42d19h25m (longest interval of active phase) June 8-December 20:  erratic intervals of mostly 4-11 days Dec 20, 2003-January 24, 2004:  mini-dormancy of 35d01h14m February 2004:  back to shorter intervals March-June:  long, erratic intervals of 9-27 days July-August:  short, regular intervals of 2 1/2-6 days EXCEPT for the shortest interval of the active phase, 1d15h56m September-October:  erratic intervals 2-9 days November 2004-March 2005  :  regular intervals 2 1/4-6 1/2 days April-May:  spring slowdown, longest interval 16d01h21m June-August 8:  regular intervals of 2-6 days August 8:  active phase comes to a screeching halt with no warning And, here are the numbers for the 2007-2011 active phase: June 5, 2007:  first eruption, interval approximately 22 months June 2007-April 2008:  First interval 36 days, then intervals erratic, a few periods of 3-5 day intervals but some much longer ones thrown in (up to 24d April 2008-June 2008:  Mini-dormancy of at least 57 days (longest interval of active phase) July 2008-November 2008:  intervals mostly 2 1/2-5 1/2 days with a little slowdown in October November 2008-April 2009:  not much known, hard to know from occasional washed marker reports April 25-May 31:  mini-dormancy of at least 35 days June 2009-December 2010:  intervals mostly 3-6 days (longest interval of 2010 spring slowdown:  12d3h34m) January-April 2011:  intervals 5-8 days May 3-June ~18:  mini-dormancy of ~45-46 days July-October 15:  intervals 2 1/2-6 days October 14-15 overnight:  last eruption of active phase; hard to tell if there was any warning due to most eruptions occurring at night So, that's more than you ever wanted to know about F&M.  The 2007-2011 active phase was a little more erratic than 2000-2005 with several mini-dormancies.  But both active phases had extended periods of very regular intervals, and *most* eruptions were preceded by "event cycles."  The nature of these evolved over time but thanks to radios, Fan & Mortar were certainly more seeable in the 2000s than ever before. --Tara Cross <a href="mailto:fanandmortar@hotmail.com">fanandmortar@hotmail.com</a> <div><div id="SkyDrivePlaceholder"></div>> Date: Sat, 17 Dec 2011 23:18:39 -0500 > From: <a href="mailto:goldbeml@ucmail.uc.edu">goldbeml@ucmail.uc.edu</a> > To: <a href="mailto:geysers@lists.wallawalla.edu">geysers@lists.wallawalla.edu</a> > Subject: [Geysers] Fan and Mortar history >  > Between the season-ending reports that Fan and Mortar looked "broken" and  > the lack of washed markers to start the winter, I have a sinking feeling  > that they've gone dormant for the time being. >  > I've cobbled together an incomplete history of F&M active phases over the  > past 25 years. Some of it is personal recollection. Where possible I  > have corroborated (or corrected) it using the OFVC logbook data posted  > on GOSA's website. >  > Dormant 1985-86? > Active 1987-88 > Dormant or very infrequent 1989 (early issues of the Sput would know) > Active 1990-94 > Dormant 1995-June 1996 > Active June 1996-May 1998 > Dormant May 1998-July 2000 > Active July 2000-August 2005 > Dormant August 2005-June 2007 > Active June 2007-October 2011 >  > In many of the active years, there is a seasonal period of longer  > intervals (sometimes over a month) during the spring high water. > The onset of actual dormancy appears to come at any time, often without  > warning (2005 is a good example). >  > On the flip side, once eruptions resume the intervals might drop right  > away to their normal range. Let's hope that happens again soon. >  > Michael Goldberg > <a href="mailto:michael.goldberg@uc.edu">michael.goldberg@uc.edu</a> > _______________________________________________ > Geysers mailing list > <a href="mailto:Geysers@lists.wallawalla.edu">Geysers@lists.wallawalla.edu</a> > <a href="https://lists.wallawalla.edu/mailman/listinfo/geysers">https://lists.wallawalla.edu/mailman/listinfo/geysers</a> </div></div>_______________________________________________ Geysers mailing list <a href="mailto:Geysers@lists.wallawalla.edu">Geysers@lists.wallawalla.edu</a> <a href="https://lists.wallawalla.edu/mailman/listinfo/geysers">https://lists.wallawalla.edu/mailman/listinfo/geysers</a></div></blockquote></div> </div></body></html>