magnetic annual change

magnetic annual change

[mag′ned·ik ′an·yə·wəl ′chānj]
(geophysics)
The amount of secular change in the earth's magnetic field which occurs in 1 year. Also known as annual magnetic change.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
Mentioned in ?