geomagnetic variation

geomagnetic variation

[¦jē·ō·mag¦ned·ik ver·ē′ā·shən]
(geophysics)
Temporal changes in the geomagnetic field, both long-term (secular) and short-term (transient).
References in periodicals archive ?
Our data confirm (though not independently, since they are included in Spottiswoode's much larger data set) that the relationship between ESP and geomagnetic variation is much stronger during a roughly two-hour window of local sidereal time surrounding 13.
Geomagnetic variations have been correlated with enhanced anxiety, sleep disturbances, altered moods, and greater incidences of psychiatric admissions [Persinger (1987, page 92)].