Wednesday 5th May 2021: This was an unusual day on the 28 MHz band in that the main opening seemed to be to the east with very little from the south. The furthest station heard on FT8 was UA0SU near Lake Baikal in Siberia.
As for the propagation mode? Probably multi-hop Sporadic-E but you can never rule out F2 on 28 MHz over those kind of distances.
A total of 157 stations in 25 countries was heard on FT8 on 28 MHz.