A coronal hole across the top of the sun. Credit: NASA/SDO
This newly released image from NASA’s Solar Dynamics Observatory shows a coronal hole across the top of the sun.
The dark area across the top of the sun in this image is a coronal hole, a region on the sun where the magnetic field is open to interplanetary space, sending coronal material speeding out in what is called a high-speed solar wind stream. The high-speed solar wind originating from this coronal hole, imaged here on October 10, 2015, by NASA’s Solar Dynamics Observatory, created a geomagnetic storm near Earth that resulted in several nights of auroras. This image was taken in wavelengths of 193 Angstroms, which is invisible to our eyes and is typically colorized in bronze.
I am wondering what to call a coronal hole that covers the surface of the sun? Is it a SOLAR SOLITON? What would be the effect on Earth of the sun’s abayence of its surface corona? Would it perhaps create a magnetic reversal on Earth? Could that be what created the 2 cores of Earth. The inner-inner core that is S/W magnetically orientated and the inner core over that that is N/S magnetically orientated. When did this happen and how?