Yellowstone Caldera Chronicles is a weekly column written by scientists and collaborators of the Yellowstone Volcano Observatory. This week's contribution is from Michael Poland, geophysicist with the U.S. Geological Survey and Scientist-in-Charge of the Yellowstone Volcano Observatory. On August 17, 1959, a magnitude 7.3 earthquake rattled western Montana .  The earthquake originated near Hebgen Lake and caused a landslide in the canyon of the Madison River , destroying a campground and causing the deaths of over 2 dozen people. The landslide also dammed the river, forming a new lake that federal, state, and local agencies, along with others, tirelessly worked to stabilize, preventing a potentially devastating flood . Mike Stickney in front of one of the original seismograph drum recorders for the Montana Regional Seismic Network at the Montana Bureau of Mines and Geology Earthquake Studies Office.…