Another eruption of the magnitude of the caldera-forming event is unlikely within the next several thousand years: no volcanic rocks or layers of ash younger than the dome are known at Crater Lake, seismic profile studies of lake sediment show no evidence of subsurface magma movement, and there have been no earthquakes of the kind associated with volcanism.
(seismic profile studies of lake sediment; show; no evidence of subsurface magma movement) (the kind; associated; with volcanism) (no volcanic rocks or layers of ash younger than the dome; are known; L:at Crater Lake) Context(no volcanic rocks or layers of ash younger than the dome are known,List([115, 181))):(Another eruption of the magnitude of the caldera-forming event; is; unlikely within the next several thousand years)
no volcanic rocks or layers of ash younger than the dome are known,List([115, 181))
seismic profile studies of lake sediment the kind no volcanic rocks or layers of ash younger than the dome Another eruption of the magnitude of the caldera-forming event
show associated are known is
no evidence of subsurface magma movement
with volcanism
L:at Crater Lake
unlikely within the next several thousand years