The two-decade-plus long existence of SIANspheric seems both improbable and poetic. The band's debut, 1995's ''Somnium,'' has been hailed as one of the top Canadian albums of all time. The expansive ''There's Always Someplace You'd Rather Be'' followed in summer 1998, by which point the band was on the verge of emulating a solar flare, its brilliant eruptions fuelled by unpredictable and destructive forces. After 2001's ''The Sound Of The Colour Of The Sun,'' Sianspheric lapsed into indefinite hiatus, though its hibernation was never total. By 2009, the band was at work on its fourth studio album, ''Writing the Future in Letters of Fire.'' This fall, that album will finally be released, ending an epic 15-year drought. Like planets aligning, fans can also look forward to the reissue of the classic ''Somnium,'' which Chart Attack ranked as #40 on the Top 50 Canadian Albums of All Time, on vinyl for the first time ever.