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<DIV><FONT size=4>Dear All:</FONT></DIV>
<DIV><FONT size=4>When I try to picking phase arrival in plotpk
window,</FONT></DIV>
<DIV><FONT size=4>I type ohpf to create a hypo file before phase
picking.</FONT></DIV>
<DIV><FONT size=4>I can get correct P-phase arrival time after I typing "P"
to decide the P-phase,</FONT></DIV>
<DIV><FONT size=4>however, I cannot get S-phase arrival time when I type
"S" to decide the S-phase,</FONT></DIV>
<DIV><FONT size=4>the arrival time of S-phase reveals 0.0 both in the PPK window
and in the hypo file.</FONT></DIV>
<DIV><FONT size=4>how can I resolve this problem?</FONT></DIV>
<DIV><FONT size=4>Thanks all for your help.</FONT></DIV></BODY></HTML>