A magnetic field may reverse a polarity.Logical formLearned from8 sentences. (Hysteresis loops) can be magnetic.Logical formLearned from8 sentences. Magnetic fields can be measured.Logical formLearned from8 sentences. A magnetic field can be circular.Logical formLearned from8 sentences. Data may be written/wrote to a magnetic tape.Logical formLearned from8 sentences. Variations can be in a magnetic field.Logical formLearned from8 sentences. A (tape format) can be magnetic.Logical formLearned from8 sentences. A format can be magnetic.Logical formLearned from8 sentences. A (storage industry) can be magnetic.Logical formLearned from8 sentences. Pulsars may have magnetic fields.Logical formLearned from8 sentences. A tail may pertain-to a magnetic field.Logical formLearned from8 sentences. A magnetic field may decay.Logical formLearned from8 sentences. A magnetic field may undergo a penetration.Logical formLearned from8 sentences. A magnetic field may reverse direction.Logical formLearned from8 sentences. A (storm activity) can be magnetic.Logical formLearned from8 sentences.