Unformatted text preview: everything in its path-pyroclastic flows – virtually unpredictable and rare o only seen in photographs-Volcano in Tanzania o Had black lava-Nov 13 th 1985 – Colombian Volcano – Nevada Del Ruiz o Mud flows cover 23,000 people and villages o Predictions were made, but were covered up-USGS – Cascades Volcanoes Observatory-Summit Mt. Penatubo o USGS team arrives at airforce base o June 5 th- swarms of earthquake formulate a level 3 alert o June 7 th – Penatubo emits large amounts of ash – level 4 alert o June 10 th – large evacuation – Airforce Base members leave o June 12 th – volcano erupts – more than 80,000 people leave their homes o Tens of thousands were saves as the largest evacuation due to prediction-benefits of volcanoes o build new land o create mountains o recycle gases and minerals o volcanoes bring atoms to the surface of earth-...
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- Spring '07
- Volcano, Cascades Volcanoes Observatory Summit Mt, Cascades Volcanoes Observatory, Nat Hazards Volcano, black lava Nov