Can FDTCC handle cross-day seismic waves in UTC time?

[zhangsx0724]

Dear Dr. Liu Min,

During executive Loc_Flow procedure, the PhaseNet, REAL, VELEST, and hypoDD_dtct all ran successfully. However, when it ran hypoDD_dtcc, the program reported an error of 'Time Mark Undefined'. After adding the header segment 'o' = 0.0 to the SAC waveform data, the program will run successfully, but the number of earthquakes in its catalog was significantly less compared to other catalog. For instance, the number of catalog in hypoDD_dtct was over eight hundred, while that in hypoDD_dtcc catalog was only around two hundred. This is clearly incorrect. My waveform data is continuous from 00:00 to 24:00 Beijing time, which corresponds to a UTC time that spans two days. For the waveform data from 00:00 to 24:00 Beijing time, the hypoDD_dtcc catalog only include the UTC day events and not the previous day. I guess this is the reason why the number of hypoDD_dtcc catalog is so small. If this is indeed the case, what should I do to obtain the earthquake catalog of the previous UTC day? Or does FDTCC not handle UTC data that spans two days?

I hope to receive your reply. Thank you very much!

Best regards,

[dylanmaximos]

Hi @zhangsx0724 ,
I'm encountering the same issue where SAC files can't be read, which prevents me from successfully running the FDTCC step. Do you happen to have a script you could share to convert MiniSEED (mseed) files to SAC format? That would be really helpful!