Latency. With Amber alerts, a latency of tens of seconds (not unusual for mass text message) is irrelevant; with earthquake, the seismic waves can overtake the

Latency. With Amber alerts, a latency of tens of seconds (not unusual for mass text message) is irrelevant; with earthquake, the seismic waves can overtake the messaging queue. (Computation itself might be happening near speed of light, high-level communication protocols in general pas through thousands of buffers)