Fellow 6th form Bloggers,
I watched the second of the volcano live programmes and I found the second one explained to be very useful in explaining how pyroclastic flows actually happen. Gravity acts on the ash plume and forces it downwards. THis means that the the plume instead of rising, surges down the volcano at speeds over 100mph and at 1000 degrees centegrate....quite hot!
Personally I would have liked to see more footage of eruptions like there was in the fourth video, as i found it a lot more interesting.
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