An example of the cancellation of magnetic fields during the decay of an active region

de la Rosa, I. G.; Aballe, M. A.; Collados, M.
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Solar Physics (ISSN 0038-0938), vol. 124, no. 2, 1989, p. 219-226. Research supported by CAICYT.

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A case of cancellation of magnetic fields is observed during the decay of a small active region. Three different sources of information were simultaneously used: high resolution magnetograms, chromospheric Ca II filtergrams and transverse velocity fields. A magnetic structure is apparently dragged to the network by the supergranular velocity field while it splits into two. There, they meet another structure with opposite magnetic polarity. After a period of coexistence, the magnetic pairs vanish, leaving no trace of either magnetic or chromospheric structures.