<html> <head> <style></style></head> <body class='hmmessage'><div dir='ltr'>Gordon Bower wrote:<BR> <BR>>At Great Fountain, the past week on Geysertimes shows three 19-21 hour double intervals and two 30-31 hour triples, as well as two closed intervals of 8h55m and 11h06m. There have been occasional scattered short intervals all summer, but the average has been over 11 hours.<BR> <BR>The time frame cited covers 17 intervals. The mean for 17 intervals has not always been over 11 hours during the 2013 summer season.  I found at least two stretches across 17 intervals where the mean was 5-10 minutes under 11 hours.<BR> <BR>The mean for the 17 intervals cited for September MAY have been 10h19m30s.  This assumes that the two 30-31 hour intervals were both triples.  However, there were at least two cases where a known double interval was over 30 hours in 2013.  Thus, the 30-31 hour intervals may not have been triples.  They could have been doubles.  The means for the two stretches across 17 intervals I mentioned were 10h50m (calculation included one presumed triple) and 10h54m (calculation did not include any presumed triple intervals).  At first glance, the September mean appears to be about 30-35 minutes greater than the mean across the September intervals.  However, if the shortest presumed triple of 30h41 minutes is instead assumed to be a double interval, as has happened in 2013, then the mean across the September intervals increases to 10h58m23s, consistent with the mean across the 17 intervals I cited.<BR> <BR> Again, I would be hesitant to conclude that Great Fountain's interval was impacted by the mid-September Lower Basin earthquakes until there was more data showing a sustained impact that did not depend upon assumptions about triple intervals.  The data cited for the September period is not inconsistent with data for other stretches during the 2013 season.<BR> <BR>Lynn Stephens<BR> </div></body> </html>