The so-called Hollywood Fault has been in the news a lot recently.
t's at the center of a fight between a developer and local residents, who claim a pair of planned skyscrapers would sit directly atop the fault. It also figures into concerns over the potential risk of unreinforced concrete buildings in Hollywood.
Scientists have known about the fault for years, but it's never been officially mapped by the state.
As KPCC's Science Reporter Sanden Totten explains, such a map could shake up development plans in the area.