Explosion at California storage tank farm

A fire raged for hours Tuesday at the NuStar storage silo farm by the Phillips 66 refinery between Oakland and Vallejo, California. There's an archived live feed from KRCA showing two of the silos burning; the embedded YouTube video shows the second silo exploding. (Jump to 1:15 and tilt head 90 degrees left). Speculation is that a minor earthquake triggered the blaze.