Steve, Wow, very labor intensive. Luckily student labor is cheap (esp. grad students...) :-) I agree that overlapping traces on a drum recorder are a bear to decipher. In fact in Eiby's book I was trying to see why he picked and marked various phases on a paper record reproduced in the book. For the life of me I couldn't figure out why he put P, PP, PPP etc. where he did...until I realized that he was marking one revolution before where I was looking. The L waves completely over-wrote the P wave arrival unless you looked very closely...and it is not a very clear reproduction. Hopefully on an original tracing it would be a bit easier. Regards, Ted __________________________________________________________ Public Seismic Network Mailing List (PSN-L)
Larry Cochrane <cochrane@..............>