This info will help you determine your immediate level of danger once a nuclear strike is launched against your country... Knowing what the target may have been will determine the attack type(airburst or groundburst)...Note: If it is a terrorist weapon, it will be close to the ground and there will be fallout...
Estimated Range from Flash-to-Bang Time
Flash-to-Bang (Min:Sec)
Range to Ground Zero (Miles)
:05
1.1
>
:10
2.2
:15
3.5
:20
4.5
:25
5.5
:30
6.7
:45
9.9
1:00
13.7
1:15
16.8
1:30
19.9
1:45
23.0
2:00
26.7
2:15
29.8
2:30
32.9
3:00
39.8
4:00
52.8
5:00
65.9
10:00
130
15:00
200
30:00
400
Range to ground zero can be estimated by counting seconds from the very beginning of the flash to the arrival of the blast wave or sound of the explosion...Remember, the flash can blind you, cover your eyes with your arm-you will still be able to see the flash through your skin!!! The possibility of terrorists using this type of attack makes knowing where it happened even more important...
