An explosion at an electrical power station in New York City on Thursday evening lit up the sky with an eerie blue light – and triggered a flurry of speculation on social media.

Some wondered if aliens had landed.

Confirming incident in #Astoria was result of transformer explosion. No injuries, no fire, no evidence of extraterrestrial activity. Please continue to follow @FDNY and @Conedison

End of Twitter post by @NYPDnews

And Con Edison shed more light on the cause of the excitement.

There was a brief electrical fire at our substation on 20th Avenue & 32nd Street in Astoria this evening, which caused a transmission dip in the area. All power lines serving the area are in service and the system is stable. Photo: Michael Friedl, New York Times pic.twitter.com/vq2Ao46rhk

End of Twitter post by @ConEdison

Meanwhile, the power cut hit New York’s LaGuardia Airport, which warned travellers to be prepared for delays.

Due to a power outage in Queens, there is partial flight operations @LGAairport. Many flights are departing, some are not. Please check flight status with carrier.

End of Twitter post by @LGAairport

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