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The biological effects of the interaction of stationary magnetic fields (SMF) with man and other animals have been reviewed. The lowest detectable limit of interaction between higher animals and a SMF is 80 to 100 G. The recommended limit on an extended-period basis for whole-body or head exposure is 200 G. Higher limits of magnetic-field exposure for limited periods of time are contained within this report.
Ketchen et al. (Sun,) studied this question.