Scientists have found the source of the Sun's magnetic engine at a depth of 200 thousand km.

Physicists at the New Jersey Institute of Technology have identified the likely location of the Sun's magnetic engine - it is ...
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The Sun's magnetic 'engine' is located 200,000 kilometers below its surface, new study claims

Helioseismic data traces the solar dynamo to the tachocline about 200,000 km down.