Earthquake project
WCJC Physical Geology Earthquake Project Purpose: Student will familiarize themselves with the Incorporated Research Institutions for Seismology (IRIS) online database for earthquake reporting, data storage, visualization, and analysis. In addition, they will investigate several predetermined locations on the Earth and analyze the occurrence, magnitude and underlying causes for earthquake activity in the regions outlined. IRIS Browser web link: Google, “IRIS earthquake browser.” Activity 1: familiarizing yourself with the data and digital resources Once you reach the link above select from the drop down menu on the right side of the screen (pictured below) the following parameters and then click apply. a. Max quakes: 200 b. Priority: Newest c. Time Range: leave this blank d. Magnitude Range: leave this blank e. Depth Range: leave this blank Show Plates: Off g. Make sure 3D view is selected, Surrounded by a red box f. 1 WCJC Physical Geology Earthquake Project Use the global map on the previous page to answer the following question(s): Question: What do you notice about the location of the most recent 200 earthquakes? Are they clustered around one region? Explain their distribution; why are they where they are? Question: Why are the earthquakes different colors? Different sizes of circles? Choose Texas as a starting point regardless of the now populated earthquakes and zoom to our state by drawing a box around where it should be on the map. You perform this regional search by selecting the box pictured below: h. Using the left-click function on your mouse to select “select new region,” and then click and hold the left mouse button, i. This will allow you to draw a box around an area as you move you mouse pointer around the screen, j. Once you draw a box you are satisfied with release the button, k. This will result in the IRIS browser populating earthquakes into only that box, l. To zoom close to the location you chose you will now select the, “Zoom to Region.” button that will have appeared. 2 WCJC Physical Geology Earthquake Project 3 WCJC Physical Geology Earthquake Project Let’s now look at earthquakes in Texas and what we can learn from the IRIS platform (since new earthquakes occur daily your map may look slightly different). Draw a box around Texas, this may take a few tries. Question: Where are the most recent earthquakes located in Texas? What cities are they associated with? Propose why this is the case? Question: How large are they (what are the earthquake magnitudes)? How deep in the earth are they (see magnified legend above)? 4 WCJC Physical Geology Earthquake Project Earthquake selection: m. Zoom in further to the city of Dallas, per the instructions in step # 2, n. Press the escape key (Esc) on your keyboard, o. Using the mouse glide over an earthquake dot and left-click to select an individual earthquake. Question: What information does the IRIS browser provide for each earthquake you select (not the one I selected; (DO NOT JUST COPY WHAT IS ABOVE)? 5 WCJC Physical Geology Earthquake Project Question: What happens when you select the “Zoom to this vicinity” button? 6 WCJC Physical Geology Earthquake Project 3-D visualization mode: Now we will proceed to venture underground and see earthquakes in 3 dimensions. Let’s examine Central America for this exercise. This is an ungraded walk through p. Zoom to Central America, per the instructions in step # 2, q. Press the escape key (Esc) on your keyboard, Click on the 3D View button which is located along the right side of the screen with the other controls. s. A new window will open looking something similar to the one on the next page. r. 7 WCJC Physical Geology Earthquake Project t. Left-click and hold the button, this will allow you to rotate the image from the starting position (airplane view essentially), to where you can see underground and into true 3D. See the 3D, underground view on the below. 8 WCJC Physical Geology Earthquake Project Activity 2: Selected Regional Analysis Chile: select a representative area of Chile, from the coast (a little ways off-shore) to the Eastern boundary of the country. Parameters to input: a. Max quakes = 500 b. Priority = Newest c. Time Range: leave this blank d. Magnitude Range: leave this blank e. Depth Range: leave this blank Show Plates: On g. Make sure 3D view is selected, Surrounded by a red box Attach the map of the selected area with the parameters above met to the document you upload to Bb. Attach a 3-D visualization of the mapped area to the document you upload to Bb. f. – Question: What do the depths and locations of the earthquakes tell you about the geology or the selected region (You will have to think about this, maybe even go read a book or two…….OMG)? I expect a paragraph or two here. 9 WCJC Physical Geology Earthquake Project Italy: select a representative area of Italy, from the Tyrrhenian to the Adriatic, and from the Alps to the tip of the boot will work. Parameters to input: h. Max quakes = 500 Priority = Largest j. Time Range: leave this blank k. Magnitude Range: leave this blank l. Depth Range: leave this blank m. Show Plates: On n. Make sure 3D view is selected, Surrounded by a red box Attach the map of the selected area with the parameters above met to the document you upload to Bb. Attach a 3-D visualization of the mapped area to the document you upload to Bb.. i. – Question: What do the depths and locations of the earthquakes tell you about the geology or the selected region (You will have to think about this, maybe even go read a book or two…….OMG)? I expect a paragraph or two here. 10 WCJC Physical Geology Earthquake Project Iceland: select a representative area of the North Atlantic surrounding the Island nation of Iceland. Parameters to input: o. Max quakes = 500 p. Priority = Newest q. Time Range: leave this blank Magnitude Range: leave this blank s. Depth Range: leave this blank t. Show Plates: On u. Make sure 3D view is selected, Surrounded by a red box Attach the map of the selected area with the parameters above to the document you upload to Bb. Attach a 3-D visualization of the mapped area to the document you upload to Bb. r. – Question: What do the depths and locations of the earthquakes tell you about the geology or the selected region (You will have to think about this, maybe even go read a book or two…….OMG)? I expect a paragraph or two here. 11
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