Radio signal coming from another galaxy detected by scientists

Poor quality article implying that these are alien signals

What natural physical mechanism is likely to create FRBs?<p>An antenna might be plasma gasses. This must be fed with an alternating current; perhaps a brief physical phenomena like a landslide of ionized material on the surface of a dense object. If the two are in close proximity and happen to be resonant it will radiate RF power.<p>Doesn&#x27;t appear that hard to conceive of given scale and diversity of the universe.

I suspect the term &quot;population&quot; when referring to the signal is misleading (as in, it is most likely _not_ a &quot;population of aliens sentient being emitting radio signal to report rush hour traffic&quot; ; but the author enjoyed the ambiguity to earn some views). What would be the meaning, in context ?

Are there any known cosmological phenomena that would produce fast radio bursts? Even if not on a periodic basis; just at all?<p>Obviously it is a big leap to assume this is evidence of ETs, but do we have any plausible explanations – besides that one – for what could be causing this?