MAN-MADE ELECTROMAGNETIC INTERFERENCE AT EXTREMELY LOW FREQUENCIES,
Abstract
In the electromagnetic spectrum between 6 and 36 c.p.s. several classes of manmade noise have been observed in rural areas adjacent to cities. Their probable sources are suggested. In many Canadian semirural areas this interference, though appreciable, is not sufficient to prevent reception of natural electromagnetic background, most of which is believed to originate with tropical lightning and to be propagated as Schumann resonance modes in the earth-ionosphere cavity. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- May 27, 1964
- Accession Number
- AD0611340
Entities
People
- J. A. Shand
- J. E. Lokken