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A civil defense siren is a siren used to provide an emergency population warning to the general population of approaching danger. Initially designed to warn city dwellers of air raids (air-raid sirens) during World War II, they were later used to warn of nuclear attack and natural disasters, such as tornadoes (tornado sirens).
A Federal Signal Thunderbolt 1003 siren. The Thunderbolt is a mechanical outdoor warning siren that was manufactured by Federal Signal Corporation from 1951 until its production ended in 1991. [1] It is a unidirectional, rotating siren with a large square-shaped horn, and can come in various colors, usually yellow, by request.
Long-term nuclear waste warning messages are communication attempts intended to deter human intrusion at nuclear waste repositories in the far future, within or above the order of magnitude of 10,000 years. Nuclear semiotics is an interdisciplinary field of research, first established by the American Human Interference Task Force in 1981.
On May 23, 2017, at around 8:55 p.m. EDT, a Nuclear Power Plant Warning was issued for the Hope Creek and Salem Nuclear Power Plants. The alert was issued for Salem and Cumberland counties in New Jersey. In a statement by the New Jersey State Police, it was a test message, intended for a small group of emergency management personnel who were ...
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Sound sample ⓘ An 1860s-era siren. [2] A siren is a loud noise-making device. There are two general types: mechanical and electronic. Civil defense sirens are mounted in fixed locations and used to warn of natural disasters or attacks. Sirens are used on emergency service vehicles such as ambulances, police cars, and fire engines.
The St. Lucie Nuclear Power Plant will conduct its quarterly testing of the outdoor warning sirens at noon Thursday. All 91 sirens within 10 miles of the plant's emergency planning zone will sound ...
The Hurricane 130 was a supercharged electro-mechanical siren utilizing an air compressor to produce a high output similar to the Thunderbolt siren. It was available in dual tone 8/10, 10/12, 8/12 port, or single tone 8, 10, or 12 port configurations, most models however came equipped with an 8/10 chopper port ratio (similar to a Major Third ) .