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Next, find the earthquake's epicenter, using the distances just obtained and the procedure below. ▸ Use the scale in Figure 3 to set the appropriate radius on your compass. You can do this by opening your compass to a length equal to the Distance to Epicenter determined for San Jose, Costa Rica, as recorded in the chart above. o NOTE: You may notice that the distance is LONGER than the scale. Open the compass to the entire length of the scale (3,000 km). Then, move the compass to the LEFT until the point that WAS on 3,000 touches 0. Then, continue opening it the REMAINING length.

Next, find the earthquake's epicenter, using the distances just obtained and the procedure below. ▸ Use the scale in Figure 3 to set the appropriate radius on your compass. You can do this by opening your compass to a length equal to the Distance to Epicenter determined for San Jose, Costa Rica, as recorded in the chart above. o NOTE: You may notice that the distance is LONGER than the scale. Open the compass to the entire length of the scale (3,000 km). Then, move the compass to the LEFT until the point that WAS on 3,000 touches 0. Then, continue opening it the REMAINING length.

Applications and Investigations in Earth Science (9th Edition)
Applications and Investigations in Earth Science (9th Edition)
9th Edition
ISBN:9780134746241
Author:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Publisher:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Chapter1: The Study Of Minerals
Section: Chapter Questions
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4. Next, find the earthquake's epicenter, using the distances just obtained and the procedure below. Use the scale in Figure 3 to set the appropriate radius on your compass. You can do this by opening your compass to a length equal to the Distance to Epicenter determined for San Jose, Costa Rica, as recorded in the chart above. 0 NOTE: You may notice that the distance is LONGER than the scale. Open the compass to the entire length of the scale (3,000 km). Then, move the compass to the LEFT until the point that WAS on 3,000 touches 0. Then, continue opening it the REMAINING length. ▶ Place your compass point on the circle labeled San Jose on your map. Scribe a complete circle around the seismic station. Repeat this procedure for New York and San Francisco. The circles you should draw should intersect near one point. This point is the epicenter! PACIFIC OCEAN Figure 3. Map of North American for plotting epicenter. ARCTIC OCEAN San Francisco, SCALE (KM) 0 500 1000 1500 2000 2500 3000 Gulf of Mexico New Yor San Jose ATLANTIC OCEAN 4. Where was the epicenter (which State and/or Country?) of this earthquake located? 5. Use a Plate Tectonics map to determine what type of plate boundary is located here. 6. Which plates are found along this boundary? 7. Describe what might be happening here to cause earthquakes at this location. BE SPECIFIC! Caribbean Sea Interpretation: 1. What is the origin time of the earthquake (at what time did the earthquake occur)? 2. Which seismograph recorded the earliest P-wave arrival? The latest? 3. What does the difference described in #2 suggest about the relative locations of each seismograph? 8. Your circles may not have intersected precisely at one point. What are the possible reasons for this? (be specific!)
Transcribed Image Text:4. Next, find the earthquake's epicenter, using the distances just obtained and the procedure below. Use the scale in Figure 3 to set the appropriate radius on your compass. You can do this by opening your compass to a length equal to the Distance to Epicenter determined for San Jose, Costa Rica, as recorded in the chart above. 0 NOTE: You may notice that the distance is LONGER than the scale. Open the compass to the entire length of the scale (3,000 km). Then, move the compass to the LEFT until the point that WAS on 3,000 touches 0. Then, continue opening it the REMAINING length. ▶ Place your compass point on the circle labeled San Jose on your map. Scribe a complete circle around the seismic station. Repeat this procedure for New York and San Francisco. The circles you should draw should intersect near one point. This point is the epicenter! PACIFIC OCEAN Figure 3. Map of North American for plotting epicenter. ARCTIC OCEAN San Francisco, SCALE (KM) 0 500 1000 1500 2000 2500 3000 Gulf of Mexico New Yor San Jose ATLANTIC OCEAN 4. Where was the epicenter (which State and/or Country?) of this earthquake located? 5. Use a Plate Tectonics map to determine what type of plate boundary is located here. 6. Which plates are found along this boundary? 7. Describe what might be happening here to cause earthquakes at this location. BE SPECIFIC! Caribbean Sea Interpretation: 1. What is the origin time of the earthquake (at what time did the earthquake occur)? 2. Which seismograph recorded the earliest P-wave arrival? The latest? 3. What does the difference described in #2 suggest about the relative locations of each seismograph? 8. Your circles may not have intersected precisely at one point. What are the possible reasons for this? (be specific!)
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