GEOMAGNETIC FORECASTS
2013-03-11 14:27:31.0 [tbs1979] insert Definition (id: null text: Natural variations in the geomagnetic field classified into quiet, unsettled, active, and geomagnetic storm levels. language code: en);
GEOMAGNETIC ACTIVITY
Natural variations in the geomagnetic field classified into quiet, unsettled, active, and geomagnetic storm levels.