> The system is so fast that the notifications arrive to areas beyond the epicenter before the seismic waves themselves, giving people and devices precious seco

> The system is so fast that the notifications arrive to areas beyond the epicenter before the seismic waves themselves, giving people and devices precious seconds to prepare TBF, even Twitter is a "notification system fast enough to arrive in areas before the seismic wave". There's been numerous reports of twitter users seeing tweets about an earthquake before experiencing the shock wave. Building a system that can do that reliably is an engineering feat but we're talking on the order of 10s of seconds, not milliseconds.