Monday, April 21, 2014

LANDSAT 8 view of Shishaldin Volcano, April 21 2014 at 08:16 UTC

LANDSAT 8 captured a night-time local view of Shishaldin volcano. Displayed here is the Thermal infrared band 10, 100 m resolution. This has been converted to Top of Atmosphere Radiance and then satellite brightness temperature.

TIR data shows max temperature of 13.62 C at the summit region. Note this is at 10.6 - 11.19 microns and given the location of these channel on the Planck curve then it will not provide higher radiances then possible from the LANDSAT Short wave infrared channels.


Google Earth view of the volcano, looking north.


LANDSAT-8 band 10 overlain on Google Earth, note the 'hot' feature at the summit region, the view below emphasizes this feature. Looking to the north.


LANDSAT-8 band 10, but now looking to the South and also transparency in Google Earth used with the aim to show volcano below the colder flanks but still emphasize the warmer summit. 

In TIR, summit at 13 C and flanks at around -16 C, local time is 12:16 AM.

Thanks to http://earthexplorer.usgs.gov/ for access to the data. Imagery processed in ENVI/IDL software.



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