Sivert and Johan Martin Kristianson

Hi! I am searching any kind of information about 2 brothers from Fosen district, Sor-Trondelag county, Norway: Sivert Kristianson born 14.april 1865 in Orkdal, Norway. Probably emigrated from Norway (Trondheim port) in 1889. Johan Martin Kristianson born 27.jan.1868, same place. Probably left Trondheim port on 22.march 1888, heading for Seattle. I have no traces of these two brothers after they left Norway. Anyone able to help me? Thanks a lot in advance!