These could come as a result of earthquakes or of other cataclysmic events. The sixth Seal prompts earthquakes and other cataclysmic events. A supernova is a cataclysmic explosion of a star. A cataclysmic implosion of the core takes place within seconds. They spell doom in cataclysmic events. The last of the cataclysmic floods occurred between 18,200 and 14,000 years ago. Cataclysmic or explosive variable stars are those that undergo a dramatic change in their properties. Scholars from various disciplines quickly dismissed predictions of concomitant cataclysmic events as they arose. Scholars from various disciplines quickly dismissed predictions of cataclysmic events as they arose. The film refers to Mayanism and the 2012 phenomenon in its portrayal of cataclysmic events. However, signals around cataclysmic variable stars hinting for planets tend to match with unstable orbits. They are survivors of a cataclysmic war. This weaker kind of repetitive cataclysmic phenomenon is called a (classical) nova. Hersey proposed a story that would convey the cataclysmic narrative through individuals who survived. Witte told Nicholas II, "that the country was at the verge of a cataclysmic revolution".