Ham
Lake Fire, Minnesota and Ontario
Along the
Minnesota-Ontario border, the Ham Lake Fire was billowing a thick cloud of
smoke toward the east on May 10, 2007, when Moderate Resolution Imaging
Spectroradiometer (MODIS) on NASA’s Terra satellite captured this image. Places
where MODIS detected actively burning fire are outlined in red. Smoke reaches
the city of Thunder Bay, on the shores of Lake Superior.
According to reports from the National Interagency Fire Center
on May 11, the fire was burning in timber and dead fuel, and had affected
50,000 acres. Only 5 percent contained, the blaze was threatening residences
and commercial property and had forced evacuations in surrounding communities.
The large image provided above has a spatial resolution (level
of detail) of 250 meters per pixel. The MODIS Rapid Response Team provides twice-daily images of the region in additional
resolutions and formats, including an infrared-enhanced version that highlights
the burn scar on the ground.
City of Thunder Bay, Ontario, Canada
Located on the shores of
Lake Superior (regional view), the
metropolitan area of Thunder Bay is one of the largest in the Province of
Ontario. It is also the major port providing access to the Great Lakes for
central Canada’s grain products. The city of Thunder Bay is relatively new; it
was incorporated in 1970 by combining the cities of Fort William (shown in this
astronaut photograph) and Port Arthur with the townships of Neebing and
McIntyre. While the spread of separate municipalities into a larger contiguous
metropolitan area is common (urban geographers call the process agglomeration), it is less common for
distinct cities to merge into a new political entity.
This detailed astronaut
photograph is centered on the older city of Fort William, in the southern
portion of Thunder Bay. Winter snows outline the street grid of the city, while
parks appear as roughly rectangular areas of unbroken white snow. Built
materials (buildings, streets) appear light gray, while vegetated areas and the
rock outcrop near Mount McKay are dark green to dark gray. The Kam River to the
south of Fort William is ice-covered, and has an even covering of snow that
traces the river channel.
Astronaut photograph ISS018-E-11174 was acquired on December 6, 2008, with a Nikon D2Xs digital
camera fitted with an 800 mm lens, and is provided by the ISS Crew Earth
Observations experiment and the Image Science & Analysis Laboratory,
Johnson Space Center. The image was taken by the Expedition 18 crew. The image in this article has been cropped and enhanced to
improve contrast. Lens artifacts have been removed. The International Space Station Program supports the laboratory to help astronauts take pictures of
Earth that will be of the greatest value to scientists and the public, and to
make those images freely available on the Internet. Additional images taken by
astronauts and cosmonauts can be viewed at the NASA/JSC Gateway to Astronaut
Photography of Earth. Caption
William L. Stefanov, NASA-JSC.
Instrument:
ISS -
Digital Camera
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