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The relationship between the decay of sunspots and moving magnetic features(MMFs) plays an important role in understanding the evolution of activeregions. We present observations of two adjacent sunspots, the gap betweenthem, and a lot of MMFs propagating from the gap and the sunspots' outer edgesin NOAA Active Region 13023. The MMFs are divided into two types based on theirmagnetic field inclination angle: vertical (0{\deg}<{\gamma}<45{\deg}) andhorizontal (45{\deg}<{\gamma}<90{\deg}) MMFs (V-MMFs and H-MMFs, respectively).The main results are as follows: (1) the mean magnetic flux decay rates of thetwo sunspots are -1.7*10^20 and -1.4*10^20 Mx/day; (2) the magnetic fluxgeneration rate of all MMFs is calculated to be -1.9 *10^21 Mx/day, which is onaverage 5.6 times higher than the total magnetic flux loss rate of thesunspots; (3) the magnetic flux of V-MMFs (including a pore separated from thesunspots) is 1.4 times larger than the total lost magnetic flux of the twosunspots, and in a later stage when the pore has passed through the referenceellipse, the magnetic flux generation rate of the V-MMFs is almost the same asthe magnetic flux loss rate of the sunspots; and (4) within the gap, themagnetic flux of V-MMFs is one third of the total magnetic flux. Few V-MMFsstream out from the sunspots at the nongap region. All observations suggestthat MMFs with vertical magnetic fields are closely related to thedisintegration of the sunspot, and most of the MMFs from the gap may originatedirectly from the sunspot umbra.

The Decay of Two Adjacent Sunspots Associated with Moving Magnetic Features