Around 10 PM last night, California residents were scared shitless by a never before heard screech that emanated from their cell phones. The culprit? An Amber Alert sent to their phone, notifying them of a kidnapped child in their area.
Much like the alert that freaked out New Yorkers in July, Californians took to Twitter to voice their bewilderment and even anger. Seriously, look at the chart of Amber Alert mentions over time below. But where did the messages come from?
For the rest of the story: http://motherboard.vice.com/blog/where-the-emergency-alerts-on-your-phone-come-from