San Andreas fault 'overdue for big quake'

New earthquake research confirms the southern end of the San Andreas fault near Los Angeles is overdue for a Big One.

The lower section of the fault has not produced a major earthquake in more than three centuries. The new study, which analysed 20 years of data and is considered one of the most detailed analyses yet, found that stress has been building up since then, and that the fault could rupture at any moment.