Annual and aggregated annual thermal reports authored by George Marler, Rick Hutchinson, or T. Scott Bryan are known to exist for 1948–1964, 1967–1977, 1979–1987, and 1990–1991. Usually, they are limited to the Upper, Midway, and Lower Geyser Basins in scope. Physical copies of the reports are located in RG 01-GEO Series 07, Yellowstone National Park Archives, Gardiner, MT. File names indicate the year the report covers, the author, and the box/folder numbers. Records were scanned by Mara Reed and MA Bellingham; they are shared here for the benefit of those interested in historical geyser activity. You can learn more about the Yellowstone archives here.