A green light shining just above the horizon during a storm in the Goldfields has left thousands of people talking.

Kalgoorlie resident Leigh Stevens was filming a Summer thunderstorm - something that’s not uncommon for the Goldfields at this time of year - in his backyard in the Kalgoorlie suburb of Picadilly on Monday night, when seconds after a flash of lightning, a green light appeared seemingly out of nowhere.

In the video, a high pitched sound can be heard right before the light appears, and online commenters have suggested that it’s part of the mystery of the green light.

“Look, what is that? What is that? It’s that weird I so hope I got that on video,” Leigh said in the video.

The light stayed in the night sky for the duration of the video, and appeared to move and change over the next couple of minutes.

Leigh posted his mysterious video on Facebook and Youtube and within two days, the video was viewed more than 130,000 times and had more than 2000 shares, with people from all over the world seeing the video.

Since being posted online, many theories about what the light is have emerged. Everything from a large laser being pointed up into the sky, to a UFO, some form of Aurora Australis in the Goldfields right the way through to chemtrails have been suggested as theories.

Even with these theories, it seems the internet is very confused.

While some people have been sceptical of the vision, another Kalgoorlie local insists he saw the light as well.

“At first I thought it was a bushfire until I looked closer and seen it was too high. I watched it for about half an hour. Eventually a very bright cloud skirted around Kalgoorlie to the north. I checked BOM and couldn’t see anything out of the ordinary on several different radars I checked. Very very strange,” Somerville resident Michael Doyle said in a comment.

A person who said they were a researcher for the Secureteam UFO channel even contacted Leigh on YouTube asking to analyse the vision.

We contacted the Bureau of Meteorology to try and find some answers.

“It’s not something we’ve ever seen before,” Neil Bennett from the Bureau of Meteorology said.

“We don’t think it (the green light) is part of the thunderstorm, we think it’s a reflection of something on the ground, rather than coming from the clouds.”

Watch the video in the player above and tell us what you think.