According to the British "Daily Mail" reported on March 28th, a "hole" 20 times larger than the earth appeared on the surface of the sun, which is the second "hole" on the sun in a week.

At present, this huge "coronal hole" is releasing solar wind to the earth at a speed of 6.5438+0.8 million miles per hour (about 2.89 million kilometers per hour), which may have an impact on the earth this Friday. At present, scientists are closely monitoring whether the solar wind will affect the earth's magnetic field and satellites.

According to reports, the solar wind refers to the supersonic plasma charged particle flow emitted from the upper atmosphere of the sun. This so-called "hole" is the coronal hole. This week, NASA's Solar Dynamics Observatory, which studies the sun, captured these two black holes.

The first "hole" found in the sun this week is 30 times as large as the earth. In the early morning of March 24th, local time, a rare geomagnetic storm triggered a rare aurora phenomenon in parts of North Carolina, Arizona and Virginia. The "hole" discovered for the second time this week is located at the equator of the sun.

"The shape of the second hole is not special. However, its location makes it very interesting. " Daniel Fossharon, associate professor of space and climate physics at University College London, predicts that the solar wind blowing from this "hole" will come to Earth from Friday night to Saturday morning this week.

Coronal hole is a large area located in the corona layer. Its density is lower than that of the surrounding matter, and its temperature is lower. From the picture, it looks like a black spot. The solar wind will be released into space through the coronal hole. If it finally reaches the earth, it may cause geomagnetic storms, damage satellites and appear obvious auroras.