May 18, 2020
Matt Burks, USDA Forest Service, Pacific Northwest Research Station
Mount St. Helens, in Washington State, erupted 40 years ago today. The largest landslide in recorded history filled valleys below with debris, and ash fell from the sky for weeks, blanketing the nearby area and affecting regions as far away as the Rocky Mountains. Within just two weeks, ash from the...
Forestry
Research and Science