Riad Alexander Michael, also known as Geyser, is a German electronic musician as well as physician.

After his noticed and critically acclaimed debut album Digger has been published under the Colonian label Mehrwert Records, he has founded his own label Geyser Recordings under which his further studio albums have been released. His productions have been described as original and have influences of different electronica styles such as downtempo, ambient or trance.^{[1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21]}

Riad Michael has written his medical dissertation concerning the subject of music drawing as psychotherapeutic method in psychogenic and psychosomatic disorders as well as absolved a scientific further education in music therapy.

• List of ambient music artists