This type of thing via haiku is always interesting to contemplate – perhaps AKH might be interested:
There was a sign from the sun, the like of which had never been seen and reported before. The sun became dark and its darkness lasted for 18 months. Each day, it shone for about four hours, and still this light was only a feeble shadow. Everyone declared that the sun would never recover its full light again.
Between the years 535 and 536, a series of major global climatic events that took place that could easily be described as a global cataclysm with catastrophic consequences. The above abstract is from the sixth century historian and church leader, John of Ephesus, in his historical work, Church Histories (‘Historiae Ecclesiasticae’).
- See more at: http://www.ancient-origins.net/unexplained-phenomena/why-global-climatic-cataclysm-sixth-century-virtually-unheard-001360#sthash.irxSfJCu.dpuf
And methinks he makes a good point:
One thing that is quite peculiar about this global cataclysm is that it is a very little known event.