I took this during a quick flight around Tauranga some 35 years ago.
The photo got published as a result of a competition I entered at the time.
I had a call from a guy at Waikato University telling me this is a very unusual event and he had a name for it which I can't recall.
He wanted the negative to make a quality copy for presentations (I think he was a environmental scientist)
Despite hunting through my thousands of negatives I could not find it. So I sent him the large print I had made. Today I found the negative!