Hello Thomas et al, I have SEED data that is separated by year, month and day (rather than year and day) – does data_structure recognise months as a value? It doesn’t mention it in the documentation. Would it be as simple as using “NET\STA\YEAR\NET.STA.CHAN.YEAR.MONTH.DAY” for the data structure? Cheers Jim -- *Jim Whiteley* *GW4+ DTP PhD Student* British Geological Survey, Keyworth, Nottingham Tel: +44(0)115 9363422 Mob: +44(0)7990 836422 *Please note, I am primarily based at BGS Keyworth*