Tectonic Review

Looking for a fast (sort of fast) review for tomorrows test? Here are a couple of PowerPoint presentations for chapters 8, 9 and 10 from our textbook.

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Mt Redoubt Ready to Erupt?

mt-redoubtI know we are looking into space right now, recording images of the Moon and watching Venus, but lets take a quick look back at Terra Firma.

Remember how we said that earthquake activity can signal a possible volcanic eruption? Well scientist have recently noticed an increase in seismic activity around Mt Reboubt in Alaska.

 

redoubt-seismicA little hard to read but here is an image from the seismograph. Click on the image to get a larger view.

 

 

 

alaskaI’m sure many of you do not know where Mt Redoubt is located so here’s a map. 

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Tungurahua Acting Up Again (January 7, 2008)

(View of Tungurahua volcano courtesy Ecuador Geophysical Institute.)

Ecuador’s Tungurahua volcano is getting feisty again. In recent weeks, the volcano belched clouds of dark ash and streams of lava. Lahars or mudslides rumbled down its slopes while the ground around the summit shook from swarms of small quakes.

People in villages surrounding the volcano are nervously watching the new activity. In August 2006, four people were killed and 5,000 homes were destroyed in an eruption that scorched thousands of acres of farmland.
Tungurahua, which means “throat of fire” in the native Quechua language, sits about 90 miles (150 kilometers) south of the capital Quito. Its last major eruption lasted from 1916 to 1918. In October 1999, an eruption forced villagers to flee the nearby town of Banos.
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