#45YearsAgo at #MountStHelens, Apr 15, 1980: Mount St. Helens became visible by midday for the first time in two days. Observers at the volcano were able to verify a lack of steam and ash emissions from the summit. Some erupting volcanoes have shown a marked decrease in activity followed by a dramatic increase just before a major eruption. Scientists have no way of knowing whether Mount St. Helens is experiencing a “lull before the storm” of a magmatic eruption or is in the final stage of this e