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Teachers' Domain - Digital Media for the Classroom and Professional Development Search Teachers' Domain Go User: My Folders Loading... Create a new folder Upload Media My Groups No groups created yet. Create a new Group Join a Group My Profile HELP | SIGN OUT Please sign in for full access This Teachers' Domain feature requires registration, which is simple, safe, and free. Register Now Citation "Mount Pinatubo: The Aftermath of a Volcanic Eruption." Teachers' Domain. 17 Dec. 2005. Web. 3 Feb. 2012. .

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Signing in now will connect your and Teachers' Domain accounts, so that in the future you will automatically be signed into Teachers' Domain when you come from . Mount Pinatubo: The Aftermath of a Volcanic Eruption Resource for Grades 3-12 | Citation Media Type: Video Running Time: 3m 30s Size: 10.5 MB View SAVE TO FOLDER Loading... Save Cancel Share | Source: NOVA: "In the Path of a Killer Volcano" Resource Produced by: Collection Developed by: Collection Credits Collection Funded by: Buy this full program on DVD Related Resources: Mount Pinatubo: Predicting a Volcanic Eruption (Video) Plate Tectonics: The Hawaiʻian Archipelago (Video) Tectonic Plates, Earthquakes, and Volcanoes (Interactive) Volcanic Eruptions and Hazards (Interactive) Volcanism (Interactive)   See Also: National K -12 Subject: Changes in the Earth Surface Processes Lesson Plans Using this Resource: Volcanoes The eruption of Mount Pinatubo in 1991 was the largest volcanic eruption in 80 years. The explosive eruption deposited tons of ash on the towns and villages near the volcano's base. Even more devastating than the eruption, however, were the devastating flows of water and debris that resulted when monsoon rains mixed with the accumulated volcanic ash. This video segment adapted from NOVA depicts some of the impact of these events on the communities surrounding the volcano. Accessibility Features: Caption Background Essay Mt. Pinatubo's 500-year dormancy ended in early April 1991. For weeks, the volcano sent warning puffs of gas and ash into the air above the island of Luzon in the Philippines. Scientists monitoring the volcano's activity, including the seismic rumblings deep within it, concluded that a powerful eruption was imminent. This prediction prompted the evacuation of 50,000 people who lived on or near the volcano's slopes, a measure that undoubtedly saved thousands of lives. Despite the warning signs and precautions, however, the power Pinatubo unleashed when it exploded on June 15th, 1991, surprised many people. And yet, the eruption itself was only a precursor to the greater devastation still to come. Pinatubo's 1991 eruption stands as the second-most-powerful volcanic event on Earth in more than a century. The blast created immense avalanches of searing hot gas, ash, and rock, called pyroclastic flows, which roared down the volcano's slopes. Approximately 500 people died as a result. In all, the eruption scattered four to seven cubic kilometers (140 to 250 cubic feet) of ash and rock over the surrounding area, burying some locations under 200 meters (650 feet) or more of debris. This massive accumulation of unstable material set the stage for the next phase of destruction. Within hours after Pinatubo's eruption, a typhoon began dumping heavy rains on the area. The rainwater mixed with the loose volcanic material on the volcano's slopes to form a dense, viscous mud with the consistency of wet cement and cause mudflows, called lahars, to race down Pinatubo's slopes. Ever since, during periods of intense rain, more lahars have periodically carried boulders, homes, vehicles, and bridges down the slopes with them, destroying or burying nearly everything in their path. In the first few years after the 1991 eruption, lahars deposited more than three cubic kilometers — about 300 million dump-truck loads — of debris on the lowlands surrounding the volcano. Since 1991, lahars have destroyed the homes of 100,000 people, and nearly 15 years later they continue to threaten at least 100,000 more. Because lahars continue to flow down Pinatubo's slopes, early warning is critical. Scientists use remote sensing tools to monitor rainfall and ground vibration in the hope that they will be able to warn down-slope communities of an imminent or active lahar. Print Background Essay Discussion Questions Describe some of the phenomena that occur in the aftermath of a volcanic eruption. What impacts do these phenomena have on humans? What effects of a volcano on people and the environment are a surprise to you? Explain. How can the communities surrounding Mt. Pinatubo protect themselves from the effects of future eruptions? Print Discussion Questions Standards About Standards | Report a Standards Mismatch About Standards | Report a Standards Mismatch About Standards | Report a Standards Mismatch   close Report a standards correlation problem To help improve this service, please report and describe any standards correlations that you find to be inaccurate. close About standards correlation Academic standards correlations on Teachers' Domain use the Achievement Standards Network (ASN) database of state and national standards, provided to NSDL projects courtesy of JES & Co. 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