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 ?
As expected, our data displayed a weak negative correlation with geomagnetic variation, though this fell short of significance.
Geomagnetic variations have been correlated with enhanced anxiety, sleep disturbances, altered moods, and greater incidences of psychiatric admissions [Persinger (1987, page 92)].