https://phys.org/news/2018-10-source-mysterious-fast-radio-home.html

In follow-up research, published today in The Astrophysical Journal Letters, we have taken one of these new detections – known as FRB 171020 (the day the radio waves arrived at Earth: October 20, 2017) – and narrowed down the location to a galaxy close to our own.

This is the closest FRB detected (so far) but we still don't know what causes these mysterious radio bursts that can contain more energy than our Sun produces in decades.