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Geysers of the World   

Geysers of Yellowstone   



  Logbridge Geyser
Feature Type: Geyser
Geyser/Spring Type: Cone geyser

Lower Geyser Basin
Great Fountain and White Creek Group

Logbridge Geyser erupts from a small vent on the right bank of White Creek a hundred feet or more upstream from the culvert where White Creek passes under teh Firehole Lake Loop road. The vent is flush with the ground 20 feet or so to the left of White Creek as seen from the roadside.

Eruptions in most years are frequent (see below) with intervals around 30 minutes often. However, even when active Logbridge Geyser sometimes has periods of inactivity lasting for an hour or more.

What to look for:
Eruptions of Logbridge Geyser consist of a jet of water angled slightly toward White Creek. Most eruptions are from 12 to 15 feet high and last for a minute or so. Eruptions are preceded by boiling to several inches.

Electronic Monitor Files
Logbridge Geyser Eruptions for 2006.TXTLogbridge Geyser Eruptions for 2007.TXT
Logbridge Geyser Eruptions for 2008.TXTLogbridge Geyser Eruptions for 2009.TXT
Logbridge 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.

Logbridge Geyser has been monitored electronically since 2006. Monitoring started to clarify the patterns of activity that had been observed during the spring and summer of 2006.

A logger is deployed each year early in June and monitoring continues through the summer months until late September. For most years the sample intervals are 1 minute during the summer.

Logbridge Geyser is located on Firehole Lake Loop Road which is in a bear closure area and it is therefore not possible to download the logger data over the winter. There has not been sufficient equipment to allow 1-minute sample interval logging for the winter, or to cover the whole winter with longer intervals. As a compromise I have chosen to set the logger on 3-minute sample rate in late September; this gives a reasonable picture of the activity and allows coverage until February.

Activity in 2010  
The overall statistics for 2010 are shown at Logbridge Geyser 2010 Statistical Summary.

In 2010 data logging continued from 1 January until the logger filled on 9 February. Logging resumed on 6 June and continues through the summer and fall.

The interval graph shows all the recorded intervals to date for 2010. Note that the moving median intervals were largely between 30 and 60 minutes for the year to date. There were intermittent long intervals, some of which exceeded six hours for all the time for which data is available.

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The graph at the right shows the intervals for the three months leading up to the last data collection.
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The next graph shows all of the intervals for the month before the last data collection.
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The interval distribution shows a peak around 44 minutes with a gradual decrease in frequency to longer intervals. As compared to 2006-8 the distribution is closer to a normal distribution with a much less pronounced tail toward longer intervals; unlike the 2009 distribution there is a secondary peak around 1h45m.

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 two minutes. The bar appearing above the label "0:28," for example, contains intervals of 27 and 28 minutes.

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The monthly statistics for 2010 are summarized in the graph at the right.
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Activity since 2006  
Logbridge Geyser's activity has been similar since the initial data set. One change that has occurred is the onset of more long intervals in the last few months of each year starting in 2008-9.
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The graph at the right shows the daily moving median intervals. This chart suggests that the typical intervals have not changed substantially in the period since 2006, although the full interval graph above shows increasing numbers of interspersed intervals greater than the median intervals of about 45 minutes.
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The final graph shows the monthly statistics. This graph illustrates the relatively constant activity as shown by the minimum, mean, and median statistics, but that the maximum intervals vary widely through the year.
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Activity in 2009
Activity in 2008
Activity in 2007
Activity in 2006

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Start of the eruption

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Logbridge in eruption

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

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