5,710 followers
RT @USGSVolcanoes: May 18, 1980 #eruption of #MountStHelens unleashed one of the largest debris avalanches in recorded history. More on how…
RT @USGSVolcanoes: May 18, 1980 #eruption of #MountStHelens unleashed one of the largest debris avalanches in recorded history. More on how…
I was on USGS team who collected sediment data and cross-section data on lower NF Toutle River and Cowlitz River May-June 1980. https://t.co/eSvAH1l0Kd
RT @USGSVolcanoes: May 18, 1980 #eruption of #MountStHelens unleashed one of the largest debris avalanches in recorded history. More on how…