I am learning to implement some deep learning technics on earthquake big data，as well as to set up a distributed database system. The very first step is to find at least dozens of terabyte of waveform data. I already checked several common data centers like IRIS and NCEDC. They are both great sources. But individuals are limited to request a small range of data for a single operation, otherwise the request would be rejected. I also tried to write a script to automatically send tremendous of requests. But the risk of being treated as malicious email is also a problem. Any ideas, datasources or tools to fix the situation?