MYSTERY "UFO sounds" recorded from under a lake in the USA have sparked a bizarre alien base conspiracy.

       But science may have some more mundane explanations as to where this Martian noise is coming from.

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       'Martian' were recorded from a frozen lake Credit: YouTube/CBS 2

       But the Steamboat Springs noises may just a simple thing of nature Credit: Getty

       Recordings taken from Steamboat Springs in Colorado were recorded by an employee of the Colorado Parks and Wildlife Service on December 4.

       The staff member posted them to Twitter, which has subsequently been shared to UFO Sightings Daily, where they have been described as "strange Star Wars sounds."

       Analysing the audio, truth-seeker Scott C. Waring said: "White sphere UFOs have been recorded and eyewitnesses by thousand of residents of Colorado over the last few years.

       "The signals point to there being an alien base deep below the lake, which amplifies the sounds below due to it being frozen... it acts as an amplifier.

       "Alien bases are never small. Most are 3-6km deep and cover an area of about 5km and even have their own weather system... with chances of rain.

       "This is 100% proof of an alien base below this lake in Colorado.

       "But... if signals can travel up from the alien base, then it would also work to send signals back down to the base.

       "A loud enough speaker placed in a dugout 1-metre deep ice hole at the centre of the lake would be sufficient to send them a sonic signal.

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       "But... what would you say? In the wrong hands, it could cause an alien military response."

       However, there seems to be a more plausible explanation for the noise.

       According to NPR, shifting in the ice of a frozen lake causes high and low sound frequencies.

       The vibrations move through the ice, but the high frequencies move faster than the low frequencies.

       And YouTube viewers were in agreement.

       "Ice makes this noise at random times when it gets thicker and thinner," said one.

       Another agreed: "I've heard this sounds myself in winters when its ice. It's got nothing to do with aliens"

       Another joked: "That's the sound the McDonald's ice cream Machine makes to let you know it's out of order".