Fig. 4. Major debris flows resulted in substantial reconfigurations of fan morphology.

A XXL debris flows reconstructed in 1816, 1849, 1933, 1955, 1978 and 1989 affected 50–75% of the fan analyzed. Gray and red dots indicate living and impacted trees, respectively. Brown areas in the inset figure point to the surface affected by a debris flow in any given year. B XXL events also resulted in major avulsions, thereby changing in pathways of debris flows from the eastern to the western margins of the fan.