Ca II Transient Brightenings associated with Canceling Magnetic Features

We analyzed transient Ca II brightening associated with small-scale canceling magnetic features in the quiet Sun near disk center using Ca II H and NaD1 filter images of the SOT/Hinode. We found that in most Ca II brightening related to CMFs the Ca II intensity peaks after magnetic flux cancellation proceeds. Moreover, brightening tend to appear as pairs of bright points of similar size and similar brightness overlying magnetic bipoles. These results imply that magnetic reconnection taking place in the chromosphere or above may be in charge of CMFs.