Volcano scientists from the USGS are closely tracking Mount St. Helens' volcanic activity as magma flows are increasing at 5 meters a day.
Earlier this week, it was revealed lava domes were rising at five meters a day.
These are formed by viscous magma being pushed to the surface below and piling up.
Like lava flows, they typically do not have enough gas or pressure to erupt explosively but they are sometimes followed by explosive activity.
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