jayfeather31 said:
If there's anything that can be proven from the data you've shown, it's that big events do not necessarily coorelate with radio transmissions. This'll be an interesting tidbit to keep in mind.
Yup, in fact the data so far has shown the opposite is true - big events are either preceded or followed by an uptick in traffic, and generally occur on low traffic days. The two NK events are particularly telling, especially when combined with the US radiation monitoring bird that was up in the air during the test. I think it shows conclusively that the US had advanced warning (through espionage or diplomatic channels) that the test was going to take place.