Lahars
Lahars
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Volcano Hazards Around Mount Jefferson
Numerous hazards can occur at composite volcanoes like Mount Jefferson including lava flows and domes, pyroclastic flows, ballistics, tephra fall, lahars and debris avalanches.
Lahar Hazards at Mount Jefferson
One of the greatest concerns during a future eruption from Mount Jefferson is the possibility of large lahars entering reservoirs on either side of the volcano, namely Detroit Lake to the west and Lake Billy Chinook to the east.