Morning Mystery Plume Above The Bay?!

As the preternaturally calm Brandon Wong rose this morning to take in the sunrise over by Anza in the Richmond, he saw something in the east that didn't make sense.

"It's just bizarre," he wrote, "I thought it was a volcano."

What is that? A fire? Chevron venting something? What could create such an odd plume?

Did you see it? Can you see it? Weigh in with your comments.

These pictures were taken around 7:30 AM. Full-size images after the jump.