VolcanoCam Images Archive
Hall Of Fame Images
|Sunrise Breaking Through The Clouds
Light, weather and the VolcanoCam camera itself often combine to produce
stunning images. The above image is a prime example. The explanation
of what you are viewing is best described with before and after images
as well. The above image was taken on April 29, 2005 at 0533 Hours, PDT.
The camera we use is a color/black and white camera. This means the
images created are all in color, except when there is insufficient light
when the camera automatically switches itself to black and white mode.
This occurs twice a day, often without fanfare. But sometimes the mode
switch, combined with lighting and weather, creates its own electronic
Image Sequence #1 - This image was taken at 0528 Hours PDT on April 29, 2005. Sunrise
that morning on Mount St. Helens occurred at 0458 Hours PDT.
The VolcanoCam is just beginning to switch from its nighttime
black and white mode to its color mode. Closeup analysis of the
original image shows some pixels had already changed to color.
While the Sun had already been up for 30 minutes, cloud cover was
sufficient that the bulk of the image shows a uniform gray.
Image Sequence #2 - Taken just five minutes
later at 0533 Hours PDT, the combination of light, clouds and camera
produced an "energy burst."
The image pixelation is readily apparent because the camera is
unable to compensate for the rapidly changing light conditions.
||Image Sequence #3 - Taken five minutes later
at 0538 Hours PDT, the VolcanoCam is in full color mode and the cloud
cover permits just enough light to show a uniform blue-purple. As
the Sun rises higher in the sky the image changed to a uniform gray,
but still in color mode.