A Comparison of Thermal Observations of Mount St. Helens before and during the First Week of the Initial 1980 Eruption

Before and during the first week of the March-April 1980 eruptions of Mount St. Helens, Washington, infrared thermal surveys were conducted to monitor the thermal activity of the volcano. The purpose was to determine if an increase in thermal activity had taken place since an earlier airborne survey...

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Bibliographic Details
Published in:Science (American Association for the Advancement of Science) 1980-09, Vol.209 (4464), p.1526-1527
Main Authors: St. Lawrence, William, Qamar, Anthony, Moore, Johnnie, Kendrick, George
Format: Article
Language:English
Subjects:
Heat transfer
Impact craters
Mountains
Plumes
Steam
Temperature gradients
Volcanic ash
Volcanoes
Volcanology
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Summary:Before and during the first week of the March-April 1980 eruptions of Mount St. Helens, Washington, infrared thermal surveys were conducted to monitor the thermal activity of the volcano. The purpose was to determine if an increase in thermal activity had taken place since an earlier airborne survey in 1966. Nine months before the eruption there was no evidence of an increase in thermal activity. The survey during the first week of the 1980 eruptions indicated that little or no change in thermal activity had taken place up to 4 April. Temperatures of ejected ash and steam were low and never exceeded 15° C directly above the vent.
ISSN:0036-8075
1095-9203
DOI:10.1126/science.209.4464.1526