As I mentioned in my last post, there was a gigantic eruption of our volcano, Tungurahua, on July 14. My brother Paul found a remote-sensing site which reported the eruption, with lots of imagery from space.
http://cimss.ssec.wisc.edu/goes/blog/archives/13426
The image above is from that website, and the center of the picture shows the huge ash cloud rising through the atmosphere shortly after the eruption. The white layer in the upper 2/3 of the picture is a layer of ordinary clouds, which ends abruptly in the arid high Andes in the lower 1/3 of the picture, casting a more-or-less linear black shadow across the whole scene.
Thanks Paul!
Lou Jost