This afternoon about 3:47 Eastern, I logged on to Hamsphere 4. It came up on the 80 meter band. What to my wondering eyes should appear but 8-10 very strong transmission spikes. I was very surprised because I have never seen that many strong signals at one time on Hamsphere 4. After about 6-8 seconds, all signals disappeared and all that was left was the usual QRN. What do you guys think is going on here?