Hi Thom, I got 22 stations, miniseed sample rate is 100Hz, cc_sampling_rate is 100.0, mov_stack is 5, days between startdate and enddate is one month, and ZZ correlation is enabled only. The filter parameters are: Low=0.1, Mwcs low=0.2, Mwcs high=0.6, High=0.7, Rms threshold=0.0, Mwcs wlen=50.0 and Mwcs step=10.0 Xiao -----Original Message----- From: msnoise-bounces(a)mailman-as.oma.be [mailto:msnoise-bounces@mailman-as.oma.be] On Behalf Of Thomas Lecocq Sent: 25 November 2013 18:06 To: msnoise(a)mailman-as.oma.be Subject: Re: [MSNoise] MemoryError Dear Xiao, How many stations pairs are you processing simultenously ? 1 day of data ? 20Hz ? Please provide more details, it'll help ! Cheers Thom Le 25/11/2013 18:39, Wang, Xiao a écrit : _______________________________________________ MSNoise mailing list MSNoise(a)mailman-as.oma.be http://mailman-as.oma.be/mailman/listinfo/msnoise

Hi Thomas, Thanks for the explanation. I downsampled cc_sampling_rate to 20, then it works. When you mentioned "100 (samples) * 86400 (seconds) * 22 (stations) = 190.080.000 samples", the "100 (samples)" means cc_sampling_rate or miniseed file sample rate? Thanks, Xiao -----Original Message----- From: msnoise-bounces(a)mailman-as.oma.be [mailto:msnoise-bounces@mailman-as.oma.be] On Behalf Of Thomas Lecocq Sent: 26 November 2013 10:37 To: msnoise(a)mailman-as.oma.be Subject: Re: [MSNoise] MemoryError Xiao, You are creating an array of : 100 (samples) * 86400 (seconds) * 22 (stations) = 190.080.000 samples. On my machine, a float (1.0 e.g.) is 24 bytes, so your array will be : 4.350 MB (=4GB), which is too big, even on my machine. You should downsample your data (cc_sampling_rate) to something closer to 2 times the High frequency, to save memory: 10 Hz would be enough. Let me know, Thomas Le 26/11/2013 11:27, Wang, Xiao a écrit : _______________________________________________ MSNoise mailing list MSNoise(a)mailman-as.oma.be http://mailman-as.oma.be/mailman/listinfo/msnoise