In this Oct. 19, 1989 file photo, workers check the damage to Interstate 880 in Oakland, Calif., after it collapsed during the Loma Prieta earthquake.
In this Oct. 19, 1989 file photo, workers check the damage to Interstate 880 in Oakland, Calif., after it collapsed during the Loma Prieta earthquake. Paul Sakuma AP
In this Oct. 19, 1989 file photo, workers check the damage to Interstate 880 in Oakland, Calif., after it collapsed during the Loma Prieta earthquake. Paul Sakuma AP
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California earthquake early warning system gets boost

September 29, 2016 09:53 AM