Lassen National Park fire sequence

Lassen National Park fire sequence

Repeat photographs of the same spot in Lassen Volcanic National Park. Photographs from 1923, 1993 and 2010 show the forest growing denser. The image from 2013 shows the forest after it burned in the 2012 Reading Fire.

Forest change caused by fire suppression in Lassen Volcanic National Park in northeastern California, shown during four different years: 1923, 1993, 2010 and 2013. Historically, these forests burned about every 10 years at low to moderate severity until fire suppression was implemented in 1905. High surface fuel loads and development of a dense forest understory due to fire exclusion created conditions for the high severity Reading Fire in 2012.

IMAGE: A.E. Weislander, U.S. Forest Service / Alan H. Taylor, Penn State