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One jump, or avalanche, in our model for crackling noise in magnets. The first spins to flip are colored blue, and the last pink. Notice the fractal structure: the avalanche is rough on all time scales.
James P. Sethna, Karin A. Dahmen, Christopher R. Myers. Nature 410, 242-250 (2001).
Image courtesy: Dr. James P. Sethna, Cornell University.