26.06.14 , , ,
Many US states use Thor Thunderstorm Warning System to protect townspeople or area residents from likely hazards of lightning strikes.
The systems are installed in crowded areas, such as: parks, college campuses, etc.
How it works: specialized sensors analyze and measure electrostatic areas located many kilometers away in the atmosphere and predict likelihood of lightning, 8 to 20 minutes before it strikes.
When a lightning is likely to strike, the warning system triggers 15-second Storm Alarm. Depending on the current situation, the alarm may or may not be repeated. As soon as the peril diminishes, the system runs 3 signals like "It's okay" for 4 seconds each.
Thor System is extremely reliable and have been used in many US counties already for more than 15 years in various areas, such as: parks, golf courses, schools and so forth.
Thor System Components:
Installed alarm system:
Report on the use of Thor Playground Equipment (Eng.).
Such systems warn only about likelihood of a lightning. External lightning protection system is used to protect against direct lightning strikes.