They have a few clues to its origin..

This type of event has only been detected a few times before.  And they still do not know for sure where it is from.  That being said they could and are likely to be happening more frequently.  However finding them is a challenge.  By using new methods to pour over enormous data sets, they are making progress in observation of these types of radio signals:

Fast radio bursts (FRBs) – mysterious bursts of energy from space that appear as a short flashes of radio waves to telescopes on Earth – have baffled astronomers since they were first reported nearly a decade ago. While only 16 have ever been recorded, they believe there could be thousands of FRBs a day.

By poring over 650 hours of data from NRAO’s Green Bank Telescope (GBT), an international group of astronomers uncovered the most detailed record ever of a FRB.

Let’s find out where they think it came from on page 2

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