Personally, I suspect they're related to decay of micro black holes. Here's something about that - https://www.perimeterinstitute.ca/video ... dio-burstsTeam finds detailed record of mysterious fast radio burst
Fast Radio Bursts (FRBs), brief yet brilliant eruptions of cosmic radio waves, have baffled astronomers since they were first reported nearly a decade ago. Though they appear to come from the distant Universe, none of these enigmatic events has revealed more than the slimmest details about how and where it formed, until now.
By poring over 650 hours of archival data from the National Science Foundation's (NSF) Green Bank Telescope (GBT), a team of astronomers uncovered the most detailed record ever of an FRB. Their research indicates that the burst originated inside a highly magnetized region of space, possibly linking it to a recent supernova or the interior of an active star-forming nebula.
http://phys.org/news/2015-12-team-myste ... radio.html
I used to walk past the perimeter institute on my way to work most days.. must have absorbed something in passing.
