Harry Woodward

Harry Woodward was a US ranger naturalist who, in 1938-9, first described a mathematical relation between the durations and intervals of eruptions from the Old Faithful Geyser. Intervals between eruptions can range from 45 to 125 minutes, averaging 66.5 minutes in 1939,^[1][2] slowly increasing to an average of 90 minutes apart today.^[3]

References

1. ^ Clyde Max Bauer and George Marler (1939). "Old Faithful, An Example of Geyser Development in Yellowstone Park". Northwest Science 13: 50–5. http://www.vetmed.wsu.edu/org_nws/NWSci%20journal%20articles/1927-1939/1939%20vol%2013/13-2/2008-02-11/v13%20p50%20Bauer%20and%20Marler.PDF. 
2. ^ Harry R. Woodward (1939). "Season Report on the Naturalist Activities at Old Faithful Station.". http://www.nps.gov/yell/historyculture/arch_interp.htm. 
3. ^ "Old Faithful". The Geyser Observation and Study Association. 2007-09-20. http://www.geyserstudy.org/geyser.aspx?pGeyserNo=OLDFAITHFUL. Retrieved October 7, 2007.