Holy Sci-Fi Movie Plot, Batman!
Oddly enough I had to read about this in the BBC news, not in a California paper.

"Oil exploration work in California's Central Valley region has uncovered a possible space impact crater." It's a 5.5km-wide bowl located in San Joaquin County, and thought to be between 37 and 49 million years old.

Aren't B-movie actors supposed to use nuclear missles to protect us from impacts like this?