It all started here. With Platform A: the first of thirty-some oil platforms built in the 1960s off the coast of Southern California. To anybody looking seaward from Santa Barbara, the platforms are nearly as much a fixture of the horizon as the Channel Islands beyond. The three closest, Platforms A, B and C, are just several miles out.
On January 28, 1969, Platform A had a blow-out. As much as 100,000 barrels of oil rose to the surface and spread. Had the oil been carried away from shore, the event might have been small news. But instead it gunked up the coast, ruining Santa Barbara’s harbor for a time, and treating the world to the first of many iconic visuals: tar-covered sea birds.
Long story short, Earth Day followed.
Some pictures from the time.