SIO 50 Lecture Notes - Lecture 9: Tephra, Pyroclastic Flow, Mount Pinatubo
3 Oct 2016
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St. mount helens: lahars (mud like volcanic flow) They"re kind of dangerous and in recent decades has the most death toll. Slurry of concrete (takes much less depth to take you out: distribution of ash that has reach vermont and main, relatively small eruption relative to its size. Breathing in ash is probably not a really smart idea: now has a tiny vertical magma chamber coming up, explosive; degassing. Kilauea (worlds most active volcano: effusive eruption; mostly lava. Volcano distribution: tend to be subduction zones along plate boundaries (chain of volcanoes, mid ocean ridges too. Modes of eruption (two modes: different elements to an eruption but it"s the end on how it"s classified, volcanic eruptions can take place for years but never decades, explosive. The more ashy and fragmented and shit, the more explosive it is. More red you see, the more passive. Eruption intensity: magma characteristics determine how violent an eruption will be:
