An actual 25,000 year cycle.

[AnthroHeart]

I got so taken in in 2012 with the idea that the Earth was going to cross the galactic plane, and huge amounts of radiation would hit the Earth. I came pretty close (not really) to joining a group who was setting up an underground bunker. There were a few of them going around. Most were pretty shady  

Apparently it was all wrong anyway.

I have read that when they switched to the Gregorian calendar, it changed our year by 8 years. So it's actually Dec. 21, 2020 they are saying now.
The energy is ramping up though over time. They talk about a solar flash, but I don't believe there will be one of those, at least not as strong as they were mentioning.

If you can feel the energy of Earth, it gets very strong at times, like being plugged into an electrical outlet. Though not as painful, but still sometimes painful.

Well, I decided then to stay with the mass population whatever may come, and will do again. But the thing that was wrong was that the Earth would cross the 2D plane of the Milky Way, and the radiation would come from the central galactic sun. It was wrong on both counts, because Earth won't do that for a while and there's a blackhole in the middle of the galaxy. It was fun to think about at the time though.

The blast of radiation was supposed to line up with various "leaps" in evolution experienced on Earth, like the Cambrian explosion. Those seem to happen in cycles as well.

The new 4D energies feel more like waves of scintillating light/electricity to me. It comes and goes, has been intense a few times though.

Blackholes have acretion discs, so they can put out a LOT of energy. Look at quasars. They are very large black holes.