How does the surface magnetic field strength of a magnetar compare to a strong MRI Machine field (3 T)?
Answer
Magnetars possess fields ranging from $10^9$ to $10^{11}$ Tesla, orders of magnitude stronger.
The difference in magnetic strength between terrestrial technology and a magnetar is astronomical. While specialized laboratories can generate magnetic fields peaking around 45 Tesla, and common medical imaging devices utilize fields around 3 Tesla, magnetars exhibit fields in the range of $10^9$ to $10^{11}$ Tesla. This vast disparity means that the fundamental forces governing atomic structure are overwhelmed near a magnetar's surface. This immense field is dynamic, constantly shifting, and the source of violent magnetic flares as tangled field lines snap and rearrange themselves.
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