Contrails

CFB Comox (a Canadian Forces Base) is located about 40 kilometers southeast of Quadra Island.
In the summer there are frequently contrails over Quadra from jets, presumably the CF-18
Hornet fighters that are based there. https://en.wikipedia.org/wiki/CFB_Comox

I thought this was a pretty interesting sight. A contrail is casting a shadow
on a higher contrail that is in the process of dissipating.

Best viewed at original size.