Data Loggers


GeyserTimes hosts logger temperature data provided by the National Park Service and the Yellowstone Volcano Observatory. Temperature data generates considerable interest among researchers. The primary use of these loggers is identifying when geysers erupt. Temperature loggers are often placed in runoff channels near the geyser and therefore they are not good indicators of pool temperature or "system" temperature. Before using this data, please read this primer on data loggers from Ralph Taylor.

Considerable effort has been put into standardizing all data logger files to convert them to the same time zone format. Sometimes loggers were deployed with either an incorrect timezone or had internal clock issues. This is not the raw data, it has been massaged to make it more manageable. If you find an error in the data, please contact


The National Park Service shall not be held liable for improper or incorrect use of the data described and/or contained herein. These data and related graphics are not legal documents and are not intended to be used as such. The information contained in these data is dynamic and may change over time. The data are not better than the original sources from which they were derived. It is the responsibility of the data user to use the data appropriately and consistent within the limitations of the data in general. The National Park Service gives no warranty, expressed or implied, as to the accuracy, reliability, or completeness of these data.

The Data

If you are interested in exploring temperature data, you can do so in your browser. Explore the Data

Researchers interested in analyzing the data can access archived files here. Data Archives