What is the attack warning signal for a potential nuclear attack?

The attack warning signal for a potential nuclear attack consists of a 3-to-5-minute wavering sound on a siren. This duration and sound pattern are designed to effectively alert the public to take immediate action, signaling that a nuclear attack may be imminent. The wavering sound is intended to draw attention and communicate the urgency of the situation.

In contrast, other potential signals, such as a standard 30-second-long alarm or a 2-minute-long alarm, do not reflect the established protocols that aim for a more extended period of warning, which is vital in a nuclear scenario where preparation time is crucial for public safety. The specific characteristics of the siren alert are structured to ensure that individuals recognize the seriousness of the threat and can respond appropriately.