2 Geology homeworks

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GEOLOGY 101 EXAM 3 EXTRA CREDIT NAME

1. FIND THE MAJOR FAULT CLOSEST TO YOUR HOME. Go to the HOMERISK website www.homerisk.com . Select Free Risk Report, then click on Neighborhood. Enter the address and select Neighborhood Risk Determination.

a. For what city are you finding a fault?

b. What is the name of your closest major fault?

c. What is the magnitude of the “Big One” for this neighborhood?

d. The “design basis” is the largest earthquake expected in a certain period of time. What

is the time period (how many years) of the “design basis” for this magnitude of earthquake?

e. What is the intensity of shaking expected for this design

earthquake?

f. Examine the Modified Mercalli Intensity Scale (in your book or on this website). What types of effects do you expect to result from an earthquake of this intensity?

2. Find out more information about this fault. Go to the Southern California Earthquake Center (SCEC) website to examine the interactive map of significant faults and earthquakes for Southern California at http://www.data.scec.org/significant/ . Zoom into your home area. The red lines are significant faults. When you click on the faults, you will be given the fault name. Find the fault you identified in part 1.

a. What type of fault is this? b. How long is it? c. When was the last earthquake (most recent surface rupture) on this

fault? d. What is the SLIP RATE of this fault?

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3. Using the SCEC Interactive map, identify the faults indicated with arrows on the map below.

4. Using the same interactive map, find some information about the Chino Hills Earthquake—the yellow circle right at Chino Hills State Park.

a. Identify the date, depth, and magnitude of this earthquake? Date Depth Magnitude

b. Is this earthquake centered on a fault? c. Which two faults are closest to this earthquake? d. Click on the Earthquake name to get more information and read the first two

paragraphs. How many aftershocks were recorded in the first two hours after this earthquake? Scroll down to the shake map. Estimate the intensity of the shaking where you live_

e. Do you remember this earthquake? Does the intensity match what you remember of this event?