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Earthquakes

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Mario Salgado

Earthquakes

Science SC300 Unit 4

May 12, 2011

Professor Jayne Yenko

Earthquakes

There are not many things in life that petrify me but earthquakes are pretty high on the list. Just the uncertainty of not knowing if this could be the next big one. Realistically speaking, where can you go to be safe from an earthquake? Luckily for me, there seems to be no great danger of earthquakes in the southeast region of the US. I live in Atlanta, Ga. and according to the map fig.17-22** in our text it seems that we are in a blue low risk area, where individual measurements of seismic wave velocities reveal cooler rocks under the southeastern US. However, just a little further northwest of Georgia according to the seismic map in the USGC website* there seems to be a small area of higher earthquake activity between Missouri, and Tennessee. The Midwest seems to be free of earthquakes while the west coast has an abundance of earthquake activity. California has the 2nd highest amount of earthquake activity in the US, after Alaska that produces more than half the earthquakes in the country.

The earth has three major subduction zones. The first is a large area called the pacific ring of fire, this includes North and South America the east coast of Asia, and the western pacific islands of the Philippines, Indonesia, New Guinea, and New Zealand. Most of the plates are being subducted, while some plates scrape past each other.

The second major divergent or earthquake zone is along the mid ocean ridges known as the Mid-Atlantic Ridge. They occur there because the oceanic crust is pulling away from both sides of each ridge and this creates stress along the major ocean ridges.

The third major convergent or earthquake zone is the Eurasian-Melanesian mountain belt. Mountains along that region were formed by a collision between the Eurasian plate and the...

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