hi all,<br>I am just starting to learn sac ,and have some difficulties using the PLOTPK command, I know it produces a plot for picking of arrival time, by problem is how i pick those arrival times after i got the plot with a x-y cursor. Do i need to creat hypo file to store the picks, please be more explicit.<br>
<br>thank you<br>melaku Bogale<br>New Mexico State University<br><br>