There is more than one artist with this name:
1)Rik Kooyman, an artist creating Dubstep music.
2)A short-lived British metal/goth/experimental band active in the early 2000's. 1)Myrkur is the alias of Rik Kooyman. Myrkur creates Dubstep music, influenced by a variety of experimental artists in Post Rock, Shoegaze, IDM and Ambient. He is, together with dj Nika, founder of the Radical organisation. Myrkur also makes Post Rock and Shoegaze influenced music under the moniker of Thou And Thy Army. Check out the Radical website and the myspace.