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| Activity Recorded by Data Logger - by Ralph Taylor |
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| Introduction |
Pink Geyser has been monitored using electronic data loggers since 2002. The record is not complete for these years but there is a substantially complete record from July 2006 to March 2009. There are large gaps during winter months when critters damaged the loggers or we were not able to access the loggers because of bear management closures. The gaps are from 2343 02 Jan 04 to 1043 21 Jan 04; 1322 22 Jan 04 to 1529 07 Jun 04; 1808 11 Jan 05 to 1322 25 Jan 05; 2132 11 Mar 05 to 1620 27 Jun 05; 0654 08 Jan 06 to 0720 25 Jun 06; and 0730 16 Apr 09 to 1343 09 Jul 09.
After the difficulties in downloading over the winters we began using a single deployment with six minute sample times for the winters of 2006-7, 2007-8, and 2008-9. During these times intervals can be determined to six-minute resolution but useful durations cannot be determined.
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| Activity in 2009 |
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The statistical summary for 2009 is available here
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The activity of Pink Geyser for 2009 to date is shown in the graph at the right. The blue line shows all of the eruption intervals and the green line shows the 1-week moving median interval. The straight red line is a linear regression fit, included to show the general trend of intervals.
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The next graph shows the intervals for the months preceding the last download. In this chart the intervals are in dark blue and the moving median is shown in yellow.
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Another useful representation of a geyser's activity is the distribution of intervals. The next chart shows the distribution of Pink Geyser intervals for the year to date (blue), the month preceding the last download (maroon) and the week preceding the last download (yellow). Note that in this and the other histograms displayed here the labels shown on the X-axis represent the upper boundary of the class, not the midpoint. Geyser times are traditionally truncated. The graph at the right has class widths of 30 minutes. The bar appearing above the label "5:00," for example, contains intervals from 4h46m through 5h00m.
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The next graph shows the Pink Geyser durations. Duration information is shown only for the times when one minute sample times were used.
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The duration histogram illustrates the distribution of Pink Geyser durations as determined from the temperature record.
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The final graph shows the Pink Geyser interval statistics by month. This graph shows the maximum, mean, median, and minimum intervals for each month for which data is available. This chart summarizes the range and gives another perspective on the activity.
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| Activity since 2002 |
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The graph at the right shows the interval data for Pink Geyser since 2002.
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The moving median graph at the right shows a smoothed representation of the interval data with the extreme values eliminated. Note the remarkable regularity of intervals in 2002 and 2003.
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The final graph shows the monthly minimum, mean, median, and maximum intervals for all of the data available. This gives another view of the changes over the past decade.
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Activity in 2008
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