Geomagnetic secular variation
SECULAR VARIATION
长期变化
地磁场长期变化
长期地磁变化
世纪变化
長期變化
Secular variation chart of geomagnetic field
Secular variation of the geomagnetic field
The models of geomagnetic secular variation
delay variation delay and delay variation bounded
interdecadal variation and interannual variation
noncyclic variation (=non-periodic variation)
Seasonal variation of diurnal variation
paleomagnetic chronological scale
Paleomagnetic chronology
paleomagnetic north pole