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5 1000 2000 3000 Distance to epicenter (kilometers) 0 4000 5000 Figure A11.2.1 A Plot the travel-time data on the graph in Fig. A11.2.1. 1. Use the distance to the epicenter and the travel times to plot the first arrivals for each of the seismograph stations listed in the table. Use a pencil as you plot each point carefully, using the grid lines to assist you in interpolating the point location on the graph. 2. Notice that the points associated with each of the seismic-wave types seem to plot along a line or curve across the graph, so there seems to be a systematic increase in travel time with increasing distance from the epicenter. Lightly sketch a line or curve through the data points you plotted for each type of seismic wave-three lines/curves in total. Be certain that your lines/curves pass through each of the data points that you plotted. When you are confident in both the location of the points you plotted and the lines/curves through those points, darken them so your teacher can see your work clearly. (Hint: Look at Fig. 11.5 for guidance.) 301

5 1000 2000 3000 Distance to epicenter (kilometers) 0 4000 5000 Figure A11.2.1 A Plot the travel-time data on the graph in Fig. A11.2.1. 1. Use the distance to the epicenter and the travel times to plot the first arrivals for each of the seismograph stations listed in the table. Use a pencil as you plot each point carefully, using the grid lines to assist you in interpolating the point location on the graph. 2. Notice that the points associated with each of the seismic-wave types seem to plot along a line or curve across the graph, so there seems to be a systematic increase in travel time with increasing distance from the epicenter. Lightly sketch a line or curve through the data points you plotted for each type of seismic wave-three lines/curves in total. Be certain that your lines/curves pass through each of the data points that you plotted. When you are confident in both the location of the points you plotted and the lines/curves through those points, darken them so your teacher can see your work clearly. (Hint: Look at Fig. 11.5 for guidance.) 301

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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Name: How Seismic Waves Travel Through Earth Course/Section: Activity 11.2 Date: Learning GOAL You will use travel-time data from an actual earthquake recorded by several seismograph stations to construct travel-time curves for P-, S-, and surface waves. Data from five seismograph stations that recorded a magnitude-7.2 earthquake on May 6, 2019, are given in Fig. A11.2.1. The earth- quake focus was -127 km below eastern Papua New Guinea, with an epicenter location of 7.0°S, 146.6°E. Travel times for the first arrival of P-, S-, and surface waves are given in decimal minutes to make it easier to plot the data on a travel-time graph. Station ID Travel time (minutes) 5 Location of Seismograph Station Distance To Epicenter (km) Travel Times (Minutes) P-wave S-wave Surface wave PMG Port Moresby, Papua New Guinea 281 0.7 1.3 HNR Honiara, Solomon Islands 1511 3.2 5.6 6.5 WRAB Tennant Creek, Australia 1943 3.9 7.0 8.3 DAV Davao, Philippines 2763 5.2 9.4 NWAO Narrogin, Australia 4128 7.0 12.6 46 11.9 17.8 0 1000 2000 3000 4000 5000 Distance to epicenter (kilometers) 5 10 15 Figure A11.2.1 A Plot the travel-time data on the graph in Fig. A11.2.1. 1. Use the distance to the epicenter and the travel times to plot the first arrivals for each of the seismograph stations listed in the table. Use a pencil as you plot each point carefully, using the grid lines to assist you in interpolating the point location on the graph. 2. Notice that the points associated with each of the seismic-wave types seem to plot along a line or curve across the graph, so there seems to be a systematic increase in travel time with increasing distance from the epicenter. Lightly sketch a line or curve through the data points you plotted for each type of seismic wave-three lines/curves in total. Be certain that your lines/curves pass through each of the data points that you plotted. When you are confident in both the location of the points you plotted and the lines/curves through those points, darken them so your teacher can see your work clearly. (Hint: Look at Fig. 11.5 for guidance.) 301
Transcribed Image Text:Name: How Seismic Waves Travel Through Earth Course/Section: Activity 11.2 Date: Learning GOAL You will use travel-time data from an actual earthquake recorded by several seismograph stations to construct travel-time curves for P-, S-, and surface waves. Data from five seismograph stations that recorded a magnitude-7.2 earthquake on May 6, 2019, are given in Fig. A11.2.1. The earth- quake focus was -127 km below eastern Papua New Guinea, with an epicenter location of 7.0°S, 146.6°E. Travel times for the first arrival of P-, S-, and surface waves are given in decimal minutes to make it easier to plot the data on a travel-time graph. Station ID Travel time (minutes) 5 Location of Seismograph Station Distance To Epicenter (km) Travel Times (Minutes) P-wave S-wave Surface wave PMG Port Moresby, Papua New Guinea 281 0.7 1.3 HNR Honiara, Solomon Islands 1511 3.2 5.6 6.5 WRAB Tennant Creek, Australia 1943 3.9 7.0 8.3 DAV Davao, Philippines 2763 5.2 9.4 NWAO Narrogin, Australia 4128 7.0 12.6 46 11.9 17.8 0 1000 2000 3000 4000 5000 Distance to epicenter (kilometers) 5 10 15 Figure A11.2.1 A Plot the travel-time data on the graph in Fig. A11.2.1. 1. Use the distance to the epicenter and the travel times to plot the first arrivals for each of the seismograph stations listed in the table. Use a pencil as you plot each point carefully, using the grid lines to assist you in interpolating the point location on the graph. 2. Notice that the points associated with each of the seismic-wave types seem to plot along a line or curve across the graph, so there seems to be a systematic increase in travel time with increasing distance from the epicenter. Lightly sketch a line or curve through the data points you plotted for each type of seismic wave-three lines/curves in total. Be certain that your lines/curves pass through each of the data points that you plotted. When you are confident in both the location of the points you plotted and the lines/curves through those points, darken them so your teacher can see your work clearly. (Hint: Look at Fig. 11.5 for guidance.) 301
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