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Etna Volcano
2001 Etna eruption satellite images
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The following Landsat 7 and Terra satellite images show
the area around the Etna volcano on July 13, the first day of the
2001 Etna volcano's eruption event, and July 29, near the end of Etna's activities.
Each image shows different band combinations
- Bands 1-3 = Visible
- Band 4 = Near Infrared
- Band 5 = Mid Infrared
- Band 6 = Far Infrared
- Band 7 = Mid Infrared
Band 6 is at 60 m resolution and the other bands are at 30 m resolution.
Description:
The two Landsat
7 scenes were both produced in true and false color, each
revealing different features of Etna's activities during the 2001 eruption. The first
image shows Etna volcano on July 13 in both true and false color.
The true color image shows the Etna's vegetation (green pixels) in
the landscape around the volcano and the bare rock surface
left by old lava flows (brown pixels), all underlying the
plume of smoke and ash (blue-grey pixels) streaming from Etna's
main craters and 2001 vents. A bright white cloud hovers above the volcano in
the July 29 scene. The false-color images reveal the rivers
of lava flowing down the flanks of the Etna volcano (the bright
orange ribbons radiating away from the volcano's eruptive fissure).
The term "volcanic cloud" in the image labels means a cloud that came from
the volcano, it may have gas, steam, and/or ash in it.
Click on thumbnail to view high resolution images.
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(1024w x
767h), 200 KB, color (true),
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(1024w x
767h), 187 KB, color (true),
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(1024w x
767h), 198.5 KB, False Color, Bands 7, 5, & 2
A lava flow (orange) from the north-northeast vent of Etna's southeast crater
is travelling to the east. A volcanic cloud is drifting to the southeast.
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 JPEG
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(1024w x
767h), 188.5 KB, False Color, Bands 7, 5, & 2
Several lava flows (orange) from fissures on the south flank of Etna and one
flow on the northeast flank. The denser part (solid white) of the volcanic cloud
is drifting to the south, while a more diffuse part is travelling to the
southeast (light purple).
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The animated zoom into the region was produced using a combination
of data from the Moderate-resolution Imaging Spectroradiometer
(MODIS), flying aboard NASA's Terra satellite, and the Enhanced
Thematic Mapper Plus (ETM+), flying aboard Landsat 7. The
two satellites fly in formation so that the MODIS image was
acquired about 20 minutes after the ETM+ image was acquired.
The higher resolution ETM+ image (15 meters per pixel) was
then nested in the larger MODIS image (250 meters per pixel)
to create the zoom effect in this animation.
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 MPEG
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(320w x
240h), 282 kb
other, 2 seconds, 63 frames
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(320w x
240h), 281 kb
other, 2 seconds, 63 frames
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 MPEG
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(320w x
240h), 1.01 MB
other, July 29, 2001, 7 seconds, 215 frames |
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