SURFACE-PRESSURE VARIATIONS FOLLOWING GEOMAGNETICALLY DISTURBED AND GEOMAGNETICALLY QUIET DAYS

Abstract

The average surface-pressure variations after geomagnetically disturbed and geomagnetically quiet days are studied at various locations in a network covering the northern hemisphere between 30 and 70°N. For the same location and the same period of time, a marked negative correlation between the two average variations exists. A small amount of this correlation stems from serial correlations in the data. However, a careful statistical analysis indicates that a large part of the correlation results from unknown causes and presumably demonstrates a link between phenomena in the ionosphere and the troposphere.