Sound waves from Japanese earthquakes hit the universe

An extraterrestrial artificial satellite noted the impact of the negative wave from the terrible earthquake in Japan on March 11, 2011.

Large earthquakes always produce low-frequency waves - frequency of about 20 to 0 Hertz, lower than the threshold that humans can hear, and spread far in the air. Elephants, pigeons and whales use sound waves to communicate and orient.

Before 2011 artificial satellites in the universe had never detected negative waves from earthquakes on Earth. But the earthquake in Japan on March 11, 2011 was an exception.Goce , the name of the European Space Agency's (ESA) Earth Observation Satellite, has recorded a negative wave from this intense seismic, the BBC reported.

Goce is the first satellite to detect negative waves from earthquakes on Earth. (Photo: ESA)

"We hunted down sound waves from earthquakes in Japan with other satellites, but didn't see them. So I think maybe we need a much more modern satellite than they do. But then they I have discovered data on sound waves from Goce, " said Dr. Rune Floberghagen, a scientist from ESA.

Goce satellite accelerometers are about 100 times more sensitive than every device of the same type that humans have ever built. In addition, it only flies about 255km above the ground, lower than any other scientific satellite.

"Thanks to these two factors, we discovered two waves of negative waves from the earthquake in Japan in 2011. Goce satellite detected them when it flew above the Pacific and Europe" , Floberghagen added.

Goce discovered a negative wave on the Pacific Ocean about 30 minutes after the 9-magnitude earthquake struck near the northeast coast of Japan. Twenty-five minutes later, the satellite detected a low-frequency wave from the earthquake when it flew over Europe.

Goce's mission is to build a map of gravity across the earth's surface. The uneven distribution of matter in the ground makes gravity on the surface of the earth not the same at every point.

Negative waves disturb the density of air molecules and increase their speed. When air molecules move faster, they will cause wind. Such winds are very weak when they spread to the edge of the atmosphere. In addition to Goce, other artificial satellites cannot detect such winds.