Autumn Rhythm (Number 30)

Autumn Rhythm (Number 30) is a 1950 abstract expressionist drip painting by American artist Jackson Pollock. The work was purchased in 1957 by curator Robert Beverly Hale for the collection of the Metropolitan Museum of Art , where it remains on display. The painting consists of muted colors such as black, white and brown paint, aggressively splattered and interlaced throughout an unpainted canvas background.

Pollock originally titled the painting Number 30, believing that titles affected how viewers perceived paintings, but it was later retitled Autumn Rhythm.

Hans Namuth's photographs of Pollock, which culminated in his 1980 book Pollock Painting, included images of Pollock painting Autumn Rhythm, which revealed that the painting was largely painted right-to-left.

Researchers looking at the underlying fractal geometry of Pollock's work have estimated the fractal dimension of the drip patterns in Autumn Rhythm at 1.67.