The term illusory motion, also known as motion illusion, is an optical illusion in which a static image appears to be moving due to the cognitive effects of interacting color contrasts and shape position. (Wikipedia)
Motion illusion
The appearance of movement in a static image.
Motion illusion
Motion illusion
Motion illusion
Anomalous motion illusion
Rotating snakes
Button creature
3 Snakes
concentric circles
The concentric circles, here, appear to spin. By Gianni Sarcone.