S0 addressed the micronova:
:
Quote:
human heartbeat 10^6 ergs
solar flare: electromagnetic storm 10^26 to 10^32 ergs
super flare: electrical catastrophe 10^32 to 10^40 ergs
micronova: extinction potential 10^34 to 10-40^ ergs
nova: planet destroyed 10^40 ergs
super nova: star destroyed 10-43^ ergs
hyper nova 10^50 ergs
"big bang" 10^75 ergs
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The difference between a superflare and a micro-nova is the former is electrical and the latter adds mass material. I guess mega-CME isn't a thing.