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

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

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World Geography
Which among the following statements is/are correct about impact crater?They are formed by the hypervelocity impact of a smaller bodyThe have similar composition like sinkholes, glacial cirques,etcSelect the correct code from the options given below:

Both 1 & 2
Only 2
Only 1
Neither 1 & 2

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