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Geysers of the World   

Geysers of Yellowstone   



  Spouter Geyser
Feature Type: Geyser
Geyser/Spring Type:

Upper Geyser Basin
Black Sand Basin

For years, Spouter Geyser was in eruption about two thirds of the time with durations of several hours and quiet periods of only an hour or two. In recent years, this has changed. In 1997, Spouter was in eruption only about one quarter of the time with durations lasting from one half to two hours. Spouter has splashing eruptions to about 6 feet.

What to look for:
Spouter overflows and has increasing bubbling activity prior to erupting.

Electronic Monitor Files
Spouter Geyser eruptions for 2000.txtSpouter Geyser eruptions for 2001.txt
Spouter Geyser eruptions for 2002.txtSpouter Geyser eruptions for 2003.txt
Spouter Geyser eruptions for 2004.txtSpouter Geyser eruptions for 2005.txt
Spouter Geyser eruptions for 2006.txtSpouter Geyser eruptions for 2007.txt
Spouter Geyser eruptions for 2008.txtSpouter Geyser eruptions for 2009.txt
Spouter Geyser eruptions for 2010.txt 

Some of the temperature data used to derive the eruption times and durations used in this section were collected by Ralph Taylor under a National Park Service research permit, and the remainder was collected by personnel working for the Geology Department of the Yellowstone Center for Resources (including Ralph Taylor). The loggers are a combination of loggers owned by the NPS and Ralph Taylor. Analysis of the raw temperature data to extract the eruption data was performed by Ralph Taylor. The eruption time files on this website may be used provided that Yellowstone National Park is credited for the temperature data and Ralph Taylor is credited for the eruption times.

Activity Recorded by Data Logger - by Ralph Taylor  

A data logger has been deployed at Spouter Geyser since July of 2000, and some data files from previous years also exist. We have attempted to obtain a continuous record of Spouter’s activity since that time, but the record has several gaps caused by equipment failure or our inability to recover the data in wintertime. There are gaps from 9 August to 4 October in 2001, 30 January to 28 May 2002, 8 April to 14 July 2004 and three very short gaps in January, July, and December 2005.

Activity in 2010  
The overall statistics for Spouter Geyser in 2010 to date are shown at Spouter Geyser 2010 Statistics.

Spouter Geyser's intervals in 2010 are shown in the graph at the right. The blue line shows all of the eruption intervals and the green line shows the 1-day moving median interval. The graphs for the current year are updated about every six weeks from October to June and weekly from June to the end of September.
Click for a larger image

The next graph shows the interval distribution for 2009. The width of the peak shows the uncertainty in intervals. Blue shows the intervals for the whole year to date, maroon shows the previous month, and yellow the previous week. 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 60 minutes. The bar appearing above the label "5:30," for example, contains intervals from 5h01m through 5h30m.
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The graph at the right shows Spouter's eruption durations for the year to date.
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The next graph shows the duration distribution for 2009. Blue shows the intervals for the whole year to date, maroon shows the previous month, and yellow the previous week.
Click for a larger image

Spouter Geyser demonstrates a striking correlation between the duration of one eruption and the interval from the start of that eruption to the start of the next eruption.

The graph at the right illustrates the correlation for all of the eruptions recorded in 2010 to date.

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Activity since July 2000  
One way to present the eruption interval data is to graph the interval as a function of time. The graph shown at the right shows all of the electronically recorded intervals since 2000.
Click for a larger image

The interval graph shows the large variation in interval from one eruption to the next. Often a better idea of the change in intervals over time can be seen from the graph of the 1-day moving median intervals, shown at the right.
Click for a larger image

Activity in 2009
Activity in 2008

Please note - this site is currently under constuction. Please visit for more information.  Last update 01-29-2017

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