<HTML><HEAD> <META charset=US-ASCII http-equiv=Content-Type content="text/html; charset=US-ASCII"> <META content="MSHTML 6.00.2719.2200" name=GENERATOR></HEAD> <BODY style="FONT-SIZE: 10pt; FONT-FAMILY: Arial; BACKGROUND-COLOR: #ffffff"> <DIV> <DIV>In a message dated 10/6/2004 1:06:48 AM Pacific Daylight Time, nedjan@ida.net writes:</DIV> <BLOCKQUOTE style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: blue 2px solid"><FONT face=Arial>I was wondering if anyone had any information on what has changed Echrinus <BR>so much. -- snip--  The time between eruptions has lengthened.</FONT></BLOCKQUOTE></DIV> <DIV> </DIV> <DIV>You tell us! ... What's especially fascinating, to me, is how the activity this year (especially from about early July to mid August) was what might best be called cyclic. There would be a few eruptions at intervals of a few hours, then an interval as great as 40 hours and more, so that the time from long interval eruption to the next long interval eruption was remarkably regular (range approximately 68 to 81 hours, average right about 75 hours). With the long intervals, at least, Echinus could overflow quite heavily but with minimal bubbling for many hours.. To speculate, perhaps the color change is due to something like the crater holding water for a longer time... or to the overall average temperature of the pool being lower... or the water supply has changes... or.......</DIV> <DIV> </DIV> <DIV>And do remember that back in the days when Allen and Day were studying things (70+ years ago), Echinus was apparently rather weak and infrequent.</DIV> <DIV> </DIV> <DIV>Scott Bryan</DIV></BODY></HTML>