GEOL 303 Lecture Notes - Lecture 11: Katia And Maurice Krafft, Pyroclastic Flow, Eruption Column
Document Summary
Eruption column of tephra fragments and volcanic gas is driven upward by the force of. Unzen, japan because they underestimated the size of the flow, assuming the tit would follow the valley like the previous flows and move past them. We had no knowledge of the destructive force of pyroclastic flows until they were documented in the eruption of the mt. Produced a pyroclastic flow that destroyed the picturesque village of st. pierre. There were a number of warning signs before the eruption. Town was too have ean election on may 10, city officials assured the citizens that there was no danger. Moderate eruption occurred on may 5, generating a lahar (volcanic mudflow) that buried 150 people in a sugar plantation. On the same day, earth tremors and fumarole activity resulted in an invasion of bugs and attacked both the human population and the domestic animals. 50 additional people died due to these bites.
