These cloud formations were seen over the western Aleutian Islands. Their color variations are probably due to differences in temperature and in the size of water droplets that make up the clouds.
<table class="toccolours mw-content-ltr layouttemplate commons-file-information-table" style="width: 100%;" dir="ltr" lang="en"><tbody><tr><th class="type fileinfo-paramfield">Camera location</th><td style="border:none;"><span class="plainlinks"><span class="plainlinksneverexpand"><a class="external text" href="https://geohack.toolforge.org/geohack.php?pagename=File:Aleutian_Clouds.jpg&amp;params=054.816667_N_0164.033333_E_globe:Earth_type:camera__&amp;language=en">54° 49′ 00″ N, 164° 02′ 00″ E</a></span></span> <a class="mw-kartographer-maplink no-icon" data-mw-kartographer="" data-style="osm-intl" href="//commons.wikimedia.org/wiki/Special:Map/13/54.816667/164.033333/en" data-zoom="13" data-lat="54.816667" data-lon="164.033333" data-overlays='["_6bff9671f9d61752d15b91287eb3f571b5a0bcd6"]'><img alt="Kartographer map based on OpenStreetMap." src="https://upload.wikimedia.org/wikipedia/commons/thumb/b/b0/Openstreetmap_logo.svg/20px-Openstreetmap_logo.svg.png" decoding="async" title="Kartographer map based on OpenStreetMap." width="20" height="20" srcset="https://upload.wikimedia.org/wikipedia/commons/thumb/b/b0/Openstreetmap_logo.svg/30px-Openstreetmap_logo.svg.png 1.5x, https://upload.wikimedia.org/wikipedia/commons/thumb/b/b0/Openstreetmap_logo.svg/40px-Openstreetmap_logo.svg.png 2x" data-file-width="256" data-file-height="256"></a></td><td style="border:none;">View this and other nearby images on: <a class="external text" href="https://wikimap.toolforge.org/?wp=false&amp;cluster=false&amp;zoom=16&amp;lat=054.816667&amp;lon=0164.033333">OpenStreetMap</a></td><td style="border:none;"><a href="//commons.wikimedia.org/wiki/Commons:Geocoding" title="Commons:Geocoding"><img alt="info" src="https://upload.wikimedia.org/wikipedia/commons/thumb/6/69/OOjs_UI_icon_help.svg/18px-OOjs_UI_icon_help.svg.png" decoding="async" width="18" height="18" srcset="https://upload.wikimedia.org/wikipedia/commons/thumb/6/69/OOjs_UI_icon_help.svg/27px-OOjs_UI_icon_help.svg.png 1.5x, https://upload.wikimedia.org/wikipedia/commons/thumb/6/69/OOjs_UI_icon_help.svg/36px-OOjs_UI_icon_help.svg.png 2x" data-file-width="24" data-file-height="24"></a><span class="geo" style="display:none"> 54.816667;  164.033333</span></td></tr></tbody></table>
NASA
2000-06-16
<a rel="nofollow" class="external free" href="http://earthasart.gsfc.nasa.gov/aleutian.html">http://earthasart.gsfc.nasa.gov/aleutian.html</a>