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E3C04
What does the value of Bz (B sub z) represent?
Pick an answer to check it.
Answer: C. North-south strength of the interplanetary magnetic field
Bz is the north-south component of the interplanetary magnetic field carried by the solar wind. Its direction affects how strongly the solar wind couples to Earth's field.
Tip: Bz = north-south part of the IMF.