I say, that looks rather interesting - not come across this magazine before. Yes, I can see how the Tunguska scenario would fit right in with Hyperborea (something for those year-long deep winters...).

​The 'zine also mentions Blood & Bronze, which I need to check out on DriveThru.  It looks reminiscent of both Thulsa's Ancient Kingdoms of Mesopotamia and Eridu (a really splendid weird Mesopotamia goldmine here: https://isimud.wordpress.com/); B&B could be a great inspirational source for an ancient worlds vibe in AS&SH.