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Kupaianah Lava Lake, Hawaii

Target Name:  Earth's Volcanos
Produced by:  P. Mouginis-Mark, LPI

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Using a spectroradiometer, scientists were able to measure the radiative temperature and thermal output from the Kupaianaha Lava Lake. This instrument collects spectra from 0.4-3.0 micrometers in over 800 channels, thereby permitting an accurate determination of the blackbody temperature of the surface. Such studies are of value because they show that the surface of a lava lake (or a lava flow) is remarkably cool - perhaps only a few hundred degrees centigrade - compared to the eruptive temperature of approximately 1,150°C (2,102°F). Such temperatures are quite similar to those the Voyager 1 spacecraft measured for the volcanic activity on Io, suggesting that silicate lavas, as opposed to molten sulfer, could exist within lava lakes on Io.

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