J-Alert
Japan nationwide broadcast alert system
Episodes
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#3761: How Countries Warn Civilians of DangerFrom color codes to sirens: how the US, Israel, UK, and France tell civilians when danger is real. -
#1869: The Invisible Broadcast That Bypasses Your Dead PhoneNo signal, no SIM, no problem. Discover the hidden GSM radio channel that hijacks your phone to scream warnings, and why it works when everything e... -
#1236: Why Life-Saving Alerts Still Use XMLFrom earthquake warnings to missile alerts, discover the high-stakes engineering that powers the world’s most reliable notification systems.