Two candidate homologous CMEs on 2002 May 22

Two coronal mass ejections (CMEs) occurred on 2002 May 22, originating from the same active region, AR 9948. Multi-wavelength data are collected in order to clarify the relationship between the CMEs, the associated flares and filament eruptions, and some other magnetic activities, which is of great importance to understand the mechanism of each phenomenon. It is tentatively suggested that the two CMEs are probably homologous.