| 1. | Such storms cause considerable disruption in magnetic prospecting operation .
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| 2. | This principle is important in magnetic prospecting only insofar as it forms the basis .
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| 3. | Because this fact was no recognized, the early magnetic prospecting for iron deposits was spectacularly unsuccessful .
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| 4. | Its low amplitude makes it less important as a source of disturbance in magnetic prospecting than the solar component .
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| 5. | Magnetic prospecting instrument
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