Nocilucent clouds and DX

According to Southgate News this has been a good year for noctilucent clouds (NLCs). The path from western Europe to Japan (a very long way!) seems to open up for a short-time in June each year on 6m. This is just the time NLCs form in the mesosphere. There seems to be a direct correlation. 2 years ago, despite using a V2000 omni vertical fed with lossy CB coax I copied 13 Japanese stations on 6m JT65. For the last 2 summers I have been monitoring 6m FT8. As yet, I have not copied Japan on 6m FT8, which is a bit less sensitive.

See http://southgatearc.org/news/2019/june/mysterious-moisture-in-the-mesosphere.htm#.XQtBAvZFy00

See also https://sites.google.com/site/g3xbmqrp3/vuhf/noctilucent