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One day before Mt. St. Helens erupted Friday, Oct. 1, in southern Washington, NASA scientists took infrared (IR) digital images that revealed signs of heat below the mountain's surface. The images may provide valuable clues as to how the volcano erupted. Scientists flew an infrared imaging system aboard a small Cessna Caravan aircraft over the mountain to acquire the IR data.
*NOTE: Please refer to compass for photograph orientation.
  | File name: 04-007-08sf.Band44Full.jpg MASTER band number 44, ( 9.16 um), collects emitted thermal energy over the mountain top. The black in the image is snow covering the ground. The lighter colors indicate warmer areas of the mountain. |
 | File name: 04-007-08sf.Band44Zoom.jpg This is a zoomed in view of the lava dome with MASTER band number 44. The black in the image is snow covering the ground. The white in the image indicate warmer areas of the dome. This may be showing potential cracks in the lava dome. |
 | File name: 04-007-08sf.R5G3B1Full.jpg This is a color composite of MASTER bands 5, 3 and 1 (0.66 um, 0.54um and 0.46 um). It simulates a natural color view of the mountain like one would see with the human eye. |
 | File name: 04-007-08sf.R5G3B1Zoom1 1.jpg This is a zoomed in view of the lava dome with MASTER bands 5, 3 and 1, (natural color). It appears that there are small regions of the lava dome that may still have snow. |
 | File name: 04-007-08sf.R44G12B02Full.jpg This is a color composite of MASTER bands 44, 12 and 2 (9.16 um, 1.61um and 0.50 um). In this image blue indicates the snow cover, orange and yellow colors are characterizing the rock type and lava age, and the red color is indicating heat. |
 | File name: 04-007-08sf.R44G12B02Zoom.jpg This is a zoomed in view of the lava dome with MASTER bands 44, 12 and 2. In this image blue indicates the snow cover, orange and yellow colors are characterizing the rock type and lava age, and the red color is indicating heat. |
  | File name: 0400708_01.jpg Browse level-0 quick-look image of one of the MASTER flight lines flown over Mount St Helens. These images are also posted on the MASTER web-site at: http://masterweb.jpl.nasa.gov/data/ |
 | File name: 0400708_02.jpg Browse level-0 quick-look image of one of the MASTER flight lines flown over Mount St Helens. These images are also posted on the MASTER web-site at: http://masterweb.jpl.nasa.gov/data/ |
 | File name: 0400708_03.jpg Browse level-0 quick-look image of one of the MASTER flight lines flown over Mount St Helens. These images are also posted on the MASTER web-site at: http://masterweb.jpl.nasa.gov/data/ |
 | File name: 0400708_04.jpg Browse level-0 quick-look image of one of the MASTER flight lines flown over Mount St Helens. These images are also posted on the MASTER web-site at: http://masterweb.jpl.nasa.gov/data/ |
 | File name: 0400708_05.jpg Browse level-0 quick-look image of one of the MASTER flight lines flown over Mount St Helens. These images are also posted on the MASTER web-site at: http://masterweb.jpl.nasa.gov/data/ |
RELATED LINKS
+ NASA Infrared Images May Provide Volcano Clues + NASA MASTER Missions
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