(TNS) — On Oct. 17, at 10:17 a.m., some phones in California buzzed with an earthquake warning.
Many others were puzzlingly silent, however — with no immediate clarification as to why, though scientists encourage people to make sure their settings are optimized for the warnings.
It was the annual test of the West Coast’s ShakeAlert system — one that comes 35 years to the day after the 6.9-magnitude Loma Prieta earthquake caused devastation across the Bay Area and Santa Cruz…