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Download Volcanic hazards in Dante`s Peak
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Name ________________________ Volcanic hazards in Dante's Peak What evidence do the volcanologists in this film have that Dante's Peak is likely to erupt soon? List at least two things. What types of tests or monitoring do the scientists do to determine the level of volcanic activity? List all that you see in the film. List several of the volcanic hazards seen in Dante's Peak. Describe two things in this film that are not geologically or scientifically reasonable or quite unlikely. List two things in Dante's Peak that are scientifically accurate. Terms and concepts from Dante's Peak Volcanic blocks and volcanic bombs Pyroclastic flow Ejecta Cascade Range (part of the Pacific Rim or Pacific Ring of Fire) Seismometer and seismogram Shallow earthquakes (<10-20 km) Precursor earthquakes "Harmonic tremors" — specific to magma moving around Composite volcano or stratovolcano Hot springs pH or acidity of water Volcanic gases (carbon dioxide [CO2], sulfur dioxide [SO2], etc.) Dead trees and animals from high levels of carbon dioxide Dormant vs. extinct vs. active volcanoes Evacuation issues (Mt. Pinatubo in the Philippines is a good example) Vesuvius and Pompei Eruption prediction Tiltmeter — measures changes in size and shape of volcanoes (remember the bulge that formed on Mt. St. Helens in 1980) Crater vs. caldera Geothermal activity — hot springs, steam, etc. "Microquakes" —!less than Richter magnitude 3.0 Lava dome Seismic activity Tectonic vs. magmatic earthquakes Contaminated water FAA warnings to airplanes during eruptions Ash and pyroclastic eruptions Unreinforced masonry, brick, and bridge structures collapsing Lightning related to volcanic activity Rockslides or landslides Lava flows Melting snow, glaciers, and rain fall resulting in mud flows or lahars Debris flows Blast knocking down trees, structures like during the Mt. St. Helens eruption Explosive, composite volcanoes