World Geography
The South Frigid Zone is the region

lying between the Antarctic circle to the south pole
has the coldest climate throughout the year
All of these
lying between 661/2 degree south and 90o south

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World Geography
The initial increase of magnetic field in magnetic storms is caused

when the gust wind itself engulfs the magnetosphere
when there is a large decrease in field intensity
when the shock wave, associated with the gusty solar wind, compresses the magnetosphere
None of these

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