<html> <head> <style></style></head> <body class='hmmessage'><div dir='ltr'> One thing I forgot to mention in my first post is that, just as it was uncharacteristic of Fan & Mortar to quit in August 2005, so it is unexpected for it to commence dormancy in October.  In the past two active phases, October has been a good month for F&M, as opposed to April, May, and June, which have historically been the worst.  For the rest of the 9 months, 5 to 7 eruptions has been a normal good month.  (I'd give numbers for November also, except that for several years there is no information about eruptions due to park closure; I'll just say that for years when electronic data was available, November was also a normal good month.) Anyway, the number of eruptions in October for each active year since 2000 are: 2000:  5 2001:  7 2002:  7 2003:  5 2004:  6 2005-06: dormant 2007:  6 2008:  6 2009:  7 2010:  9 2011:  3, dormancy began October 15 The 9 eruptions in 2010 match the best for a single month for the past 2 active phases, at least according to my records.  It happened about a half dozen times. --Tara Cross fanandmortar@hotmail.com <div><div id="SkyDrivePlaceholder"></div><hr id="stopSpelling">From: fanandmortar@hotmail.com To: geysers@lists.wallawalla.edu Date: Sun, 18 Dec 2011 16:30:29 -0700 Subject: Re: [Geysers] Fan and Mortar history <meta http-equiv="Content-Type" content="text/html; charset=unicode"> <meta name="Generator" content="Microsoft SafeHTML"> <style> .ExternalClass .ecxhmmessage P {padding:0px;} .ExternalClass body.ecxhmmessage {font-size:10pt;font-family:Tahoma;} </style> <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 fanandmortar@hotmail.com <div><div id="ecxSkyDrivePlaceholder"></div>> Date: Sat, 17 Dec 2011 23:18:39 -0500 > From: goldbeml@ucmail.uc.edu > To: geysers@lists.wallawalla.edu > 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 > michael.goldberg@uc.edu > _______________________________________________ > Geysers mailing list > Geysers@lists.wallawalla.edu > https://lists.wallawalla.edu/mailman/listinfo/geysers </div> </div> _______________________________________________ Geysers mailing list Geysers@lists.wallawalla.edu https://lists.wallawalla.edu/mailman/listinfo/geysers</div> </div></body> </html>