assignments - should reappear with a circle centered on the...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
Sheet1 Page 1 Constructing a travel-time graph -------------------------------- Begin by clicking on the bomb tool on line 1 of the Tasks menu. A map will appear. Drag the 5 seismic stations to different locations on the map. Then click on the "Trigger Earthquake" button on the map. Click on the "S-P" tool on line 2 of the Tasks menu to view the first of five seismographs from your five seismic stations. Put your cursor to the left of the P wave (marking the beginning of the earthquake) and drag your cursor to the beginning of the S wave to measure the lag time between the beginning of these two waves. Record the lag time in your journal. Repeat this for all five stations by selecting each station in the menu in the upper left of the screen. Click on the "Distance" tool in the tool box. The map
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: should reappear with a circle centered on the epicenter. Drag the circle to each station and record the distance in your journal. Check your results with the Verify Answers. Click on the "point plotter" tool from the tool box. A graph of lag time vs. distance will appear with a table of your data to the right. Drag the red points representing your data onto the graph. Once you've plotted the points accurately, the curve fitting tool will become active. Use it to drag the blue line so that it best fits these points. The best fit line will have the smallest possible "error sum of squares." Use the "travel-time" tool to complete the questions in the lower part of the journal page. If required by your instructor, print your completed journal and travel-time graph....
View Full Document

{[ snackBarMessage ]}

Ask a homework question - tutors are online