This morning heard at 2030z to 2130z on 30m band. I found the signal peak and bottom times.
At the before 2030z, the European signals came here and good signal levels. However, I called European stations that there was no returned to my call. I tried a few stations that it was almost same situation.
But after 2030z, the band situation was changed. The European stations signal to down however I called CQ then many stations continue. This good situation until 2100z.
Before 2100z, the band condition was dropped and almost DX signal went out on the band. The QRV signal was JA stations only. No decode DX signal that it situation had about 15minute.
After 2115z, the band came back good situation. That time had a lot of DX signal and easy contacted for there.
The good path between Europe to JA.
1900z-2030z so so sometimes oneway path
2030z-2100z can good contact
2100z-2115z without signal
2115z- 2200z can good contact