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What is the meaning of integral of negative magnetic field (nT) over time?

These field decreases are produced mainly by the equatorial current system in the magnetosphere, usually referred to as the ring current. … Positive variations in Dst are mostly caused by the compression of the magnetosphere from solar wind pressure increases. …
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Does Magnetic Deviation depend on altitude?

Technically yes, but practically, usually no. The magnetic field varies in three dimensions and the variations are not parallel to the Earth's surface. However, horizontal distances varies usually o …
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