Odd circular shape beneath the ocean in Google Earth images is probably not aliens

There is a circular shape on the seafloor that is raising cries of "U.S. Aliens", but chances are it is not.

Scott Waring, proprietor of UFOsightingsdaily.com and frequent discoverer of objects that he calls " 100% proof" of ancient aliens, gave the report. He claims to have found a monkey on Mars, a body of a Martian monarch killed in battle 1 million years ago, and many other things. The shape is located off the coast, near a series of enormous geoglyphs built by the Nazca people almost 2,000 years ago. These lines are often used by conspiracy theorists who claim aliens were involved in their construction.

What did Waring find? A circle is 4.2 miles in diameter and can be seen off the coast of Lima. The circle appears to rise from the bottom.

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The ocean floor nubbin is probably a data artifact. There are strange shapes on the ocean floor. The company uses data from multiple sources. These sources have different levels of details and when they are combined, strange shapes appear.

The data quirk that can lead to strange hill-and-valley artifacts is based on a map made by the Scripps Institution of Oceanography, which uses gravity measurements from satellites to roughly map out the ups.

The company gets data from ship-based surveys. A high-resolution picture can be obtained from these surveys, which send sound down toward the ocean floor. At times, the rough satellite-based measurements and the shipboard measurements do not agree, and a single point of data from one or the other can lead to a steep hill or dip.

It is possible that the shape is a side effect of stitching together multiple data sources because it is located right in the middle of a line where a shipboard survey has clearly passed. These long lines are visible all across the ocean floor and are sometimes mistaken for signs of a lost civilization.

The shapes on the ocean floor are odd. Satellite imagery that covers almost the entire ocean floor can be used to resolve features down to about 1.5 km, while modern seafloor sonar can reveal details on the order of 100 m. Only 5% of the ocean floor has been mapped by modern technology.

It was originally published on Live Science.

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