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Thermal Infrared Observations of Lava Flows During the 1984 Mauna Loa EruptionThermal infrared videotape images of the flowing lava streams and the vent areas at 10.6 microns were made, as well as some broadband images in the 8 to 12 micron range (for gas plume detection). These data were calibrated with on-site hand-held radiometer measurements, in-flow thermocouple measurements, and with later laboratory kiln measurements. Infrared video data are useful in quantitatively assessing the pattern and mode of flow thermal losses, particularly with regard to radiative losses from established/incipient floating crust. The general cooling of the flows downstream was readily apparent. Upper reaches of the active flow exhibited nearly crust-free main channels, radiating at about 700 to 800 degrees C. Below about the 7500 foot level (about 8 km from the vent) the flows formed nearly continuous crust and tended to spread, become less well-defined and founder due to a reduction in slope. Nevertheless, in thermal IR observations, the surface trace of the active subsurface channel was visible, radiating at about 500 to 700 degrees C. At the active flow front, most solid crust radiated at temperatures less than 500 to 600 degrees C, however bright high temperature interiors (approximately 900 to 1000 degrees C) were clearly visible though evolving fissures.
Document ID
19850015253
Acquisition Source
Legacy CDMS
Document Type
Other
Authors
Pieri, D. C.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Gillespie, R.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Kahle, A. B.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Kahle, J.
(California Div. of Mines and Geology Pasadena, CA, United States)
Baloga, S. M.
(Jet Propulsion Lab., California Inst. of Tech.)
Date Acquired
August 12, 2013
Publication Date
April 1, 1985
Publication Information
Publication: NASA, Washington Repts. of Planetary Geol. and Geophys. Program
Subject Category
Geophysics
Accession Number
85N23564
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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