The Twilight Zone | The Twilight Zone (1959 TV series) | Negative Zone | Panama Canal Zone | Eastern Time Zone | Hayward, California | Twilight Zone | San Andreas Fault | Korean Demilitarized Zone | Hayward Gallery | Hayward | The Dead Zone (TV series) | The Dead Zone | Richie Hayward | Pacific Time Zone | Lawrence Hayward | Hardiness zone | Central Time Zone (North America) | Ponce Historic Zone | Metekel Zone | Arsi Zone | The Twilight Zone (2002 TV series) | Susan Hayward | O-Zone | Mirab Welega Zone | Hadiya Zone | Gamo Gofa Zone | Debub Omo Zone | Zone | Semien Omo Zone |
It had been known for over thirty years that a major earthquake on either of two nearby faults (the San Andreas and the Hayward) would destroy the major cantilever span.