The object, which observers say looks man-made rather than natural, is estimated to measure more than 2.5miles in diameter and is surrounded by what look like massive tank tracks. Other observers suggest the tracks may be trenches or fortifications. But the most baffling thing is the circular object which appears to have left a 41 mile track in its wake as it trundled across the floor of the North Pacific off the Californian coast .

Amazing close-up of mysterious object under the Pacific Ocean Thu, March 2, 2017 Do you know what this 2.5mile long object moving under the Pacific Ocean could be? Play slideshow Youtube 1 of 7

PH The object is estimated to measure more than 2.5 miles in diameter

Google Mystery of the deep: Are these tank tracks or fortifications below the Pacific ?

While we are up staring at the sky all day and worrying about what’s up there we have 90 per cent of our oceans unchartered Tyler

The object was brought to the attention of alien investigators SecureTeam10 Tyler, who helps run the internet investigations site, said: “There are certain areas of the ocean that are obviously blurred out. But what better place would there be for another race or another group of beings to hide than in the deep of our own oceans? “While we are up staring at the sky all day and worrying about what’s up there we have 90 per cent of our oceans unchartered.

PH Tyler helps run the internet investigations site SecureTeam10

“We have no idea what’s there and we have a lot of mysterious UFO phenomena happening in our oceans. “Some of these tracks truly do seem to have been dug out by something. “We see a large circular object and an obvious path or trail created by it – and it disappears into a blurred out area – how convenient.”

GETTY Tyler said there are certain areas of the ocean that are obviously blurred out

Not everyone is convinced however. After SecureTeam10 published the Google sonar map on YouTube Mikitan Fox said: “Large parallel lines = tectonic fissures, naturally occurring sorry. “The curvy line is likely the pathway of a underwater current and deposition field of said current.”

Scariest washed up sea monsters Mon, September 25, 2017 Unknown washed up sea monsters that haven't been identified prove the ocean is a terrifying place Play slideshow @preetalina/Twitter 1 of 29 This creature washed up on the shores of a Texas beach

GETTY Up to 90 per cent of oceans are unchartered