Astrophysicist (and author of books like Earth Under Fire and Genesis of the Cosmos) Dr. Paul LaViolette discusses the evidence of a cycle of explosive outbursts from our galactic center that periodically reach Earth with a wave of radiation, light, and a gravity wave that pushes cosmic dust into our inner solar system and has repeatedly caused global catastrophes in ancient times.
The evidence suggests that galactic superwaves trigger catastrophic POLE SHIFTS and that the next POLE SHIFT is on schedule to arrive very soon.
[youtube https://www.youtube.com/watch?v=yIor3JgQCr8&w=854&h=480]
Unrelated: http://theeconomiccollapseblog.com/archives/the-weakening-of-earths-magnetic-field-has-greatly-accelerated-and-that-could-have-apocalyptic-implications-for-all-of-us
The article is notable for the degree to which the comments section has been spammed into oblivion.