Choose a geyser data logger, a starting date and the amount of data to display then click "Load." The more data you choose, the more your computer will be taxed to display. If you have a slower computer, choose smaller time increments.

Eruption entries can also be added by choosing a geyser.

Once data is loaded, you can move the chart using the arrow buttons or the left and right arrow keys. To move more or less in time, change the value between the arrows.

Use the lower chart to zoom in. Click and drag to highlight a section of chart to see in greater detail. Click anywhere on the lower chart to zoom back out.

Entries will appear as letters. Move the mouse over the letter for more detail. Double click them to go to that eruption's detail page.

Adjust the slider to show more temperature point dots.

E - electronic entry

X - exact time

ns - near start

ie - in eruption

A - approximate

Mjr - entry was designated as major

Min - entry was designated as minor

ini - entry was designated as an initial to a series

wc - entry was viewed from the webcam

? - entry was designated as questionable

Check the punchcard to see which geysers have electronic temperature data available

To share a chart with others, copy the URL.