You familiar with Doug Vogt's work? Pretty much parallels this, except he predicted a 12,800+/- year recurrence interval. He claims the CIA reviewed and essentially concurred in his findings - he may have referenced Chan Thomas in his work. Sadly he died in 2022 or 2023 from complications following a "gardening accident".
If memory serves, the date he arrived at for the next catastrophe is Oct. 15, 2046. Some of his info/data/hypotheses seemed utterly whacked, and others seemed brilliantly conceived and researched. IMHO most of what he arrived at made sense.