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A cooperative observation with Hida observatory and Hinode satellite wasperformed on an emerging flux region. The successive Ca II K spectro-heliogramsof the emerging flux region were taken by the Domeless Solar Telescope of Hidaobservatory. Hinode observed the emerging flux region with Ca II H and Fe IStokes IQUV filtergrams. In this study, detailed dynamics and temporalevolution of the magnetic flux emergence was studied observationally. The eventwas first detected in the photospheric magnetic field signals. 3 minutes later,the horizontal expansion of the dark area was detected. And then, 7 minuteslater than the horizontal expansion, the emerging loops were detected with themaximal rise speed of 2.1 km/s at chromospheric heights. The observed dynamicsof emerging magnetic flux from the photosphere to the upper chromosphere iswell consistent with the results of previous simulation works. The gradualrising phase of flux tubes with a weak magnetic strength was confirmed by ourobservation.

Ca II K Spectral Study of an Emerging Flux Region using Domeless Solar Telescope in Hida Observatory