For years, Keen has been using lunar eclipses to probe the transparency of the stratosphere. When the stratosphere is clogged with volcanic ash and other aerosols, lunar eclipses tend to be dark red.
The bright orange color of the April 15th eclipse, along with the ready visibility of the turquoise fringe, suggests that the stratosphere is clear. This is a key finding for climate change models.
To see the effects of ozone on the eclipse, you have to be looking at just the right moment.
Readers are invited to browse the gallery for more examples: Realtime Eclipse Photo Gallery. www.spaceweather.com