Sweden researchers said they have recently found evidence that can clearly prove that ancient earth was hit by two meteors at the same time almost 458 million years ago.

The team has also discovered two craters in county of Jämtland in central Sweden. According to Erik Sturkell, a professor of geophysics at the University of Gothenburg, said in a statement that the meteors that formed the craters stroked earth’s surface at a few miles from each other and at the same moment.

As per researchers, Jämtland was just a seafloor, about 1,600 feet (500 meters) below the surface of the water, when the meteors hit into earth. Researchers noted that one of the craters formed after the strike is huge, and measures around 4.7 miles (7.5 kilometers) across.

The other, smaller crater which is only about 2,300 feet (700 m) across is located just 10 miles (16 km) from its larger neighbor. After analyzing the data collected from a drilling operation, the team determined that the impact craters were formed at the same time.

The information they collected revealed similar geological sequences, or layers of rock, present inside each other. The sediment accumulation inside the craters dated back to the same time, according to Sturkell.

Sturkell said these impacts can be called as simultaneous impacts. The meteors likely crashed to earth after collision of the two large asteroids in the asteroid belt between Mars and Jupiter some 470 million years ago, he said.

When the meteors crashed into earth they displaced the water underneath them, leaving two huge, dry pits in the seabed for about 100 seconds, said researchers.