Isopors

The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Isopors

 

the isograms of secular variations in the components of terrestrial magnetism.

Isopors are concentrated around certain foci of secular movement, where the variations reach maximum values of ~0.16 amperes per m(~2 X 10 -3 oersted). The foci of secular movement are continuously shifting (up to 0.2 degrees per year) and changing in value. Accordingly, the entire isopor aggregate changes with time.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.