shadow bands

noun

1. slow-moving waves of light and dark observed to move across light-coloured surfaces on the earth just before and after totality in a solar eclipse. They are thought to originate from the effects of irregular atmospheric refraction

Example Sentences

As the total phase approaches, the phenomenon known as shadow bands may sometimes be seen.

From Project Gutenberg

Then the shadow bands may be seen flitting across the landscape, like "visible wind."

From Project Gutenberg