Hekla 2000
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Hekla Images

The following pictures were received from the NOAA polar orbiting weather satellites.  They show a sequence of images around the time of the eruption of Hekla at the end of February 2000.  They are false-colour pictures, with the colour representing the apparent temperature, and the brightness taken either from a long-wavelength visible sensor (daytime) or a thermal sensor (nighttime).  The infra-red is presented black-hot, so the man plume is apparently cold, not hot as you might expect.

Roger Ray has kindly provided me with high-resolution data, one of which is a version of one of the images below.  This has allowed me to process the image and extract the channel 3 data which is particularly sensitive to forest fires etc. because of the particular wavelength at which it works.  By making channel 3 red, you can clearly see the shape of the erupting area.  I've put these images at the bottom of this page as they are a little larger (33KB and 38KB).  You can find more images on Roger's Web site (no longer active).

The images have all been manually rotated to be in approximately the same north upwards orientation.  I've indicated whether the brightness component is derived from channel 2 (visible) or channel 4 (IR).

2000 Feb 26, 1600 UTC

2000 Feb 26, 1936 UTC
IR - clear cold plume

2000 Feb 27, 0554 UTC
IR - plume changes direction

2000 Feb 28, 0902 UTC
Visible - is this a plume?

2000 Feb 29, 1525 UTC

2000 Mar 01, 0958 UTC

Roger Ray's HRPT Images

N1426627-fc-corrected-detail.jpg (39131 bytes)
False colour NOAA14 HRPT image, 2000 Feb 29, 1525 UTC
Brightness = channel 2, colour = channel 4

N1426627-fc-ch3red-corrected-detail.jpg (33733 bytes)
False colour NOAA 14 HRPT image, 2000 Feb 29, 1525 UTC
Red = - channel 3,  Green = channel 2,  Blue = channel 4


Copyright © David Taylor, Edinburgh   Last modified: 2015 Jan 18 at 09:32