As you can see in my Twitter on the image provided by Nasa, 

a coronal hole originates from the Sun's north pole. 

The coronal hole however has a southward extension that follows a very long and narrow path all the way to the solar equator. 

Coronal hole faces Earth.

We re approaching solar minimum so sunspots and solar flares have become a rare sight. 

Even coronal holes have migrated to higher latitudes but today as a southward extension of the northern hemisphere polar coronal hole faces our planet. 

This means solar wind flowing this coronal hole had a chance to arrive at our planet August 15.

That means not expect geomagnetic storm conditions but active geomagnetic conditions (Kp4) are possible. 

Active geomagnetic conditions (Kp4)

Threshold Reached: 23:59 UTC.  

17.10pm   + 1  

 

17.11pm   + 1 

17.20pm   + 1 

First post as Optical Astronomy, +exactly is: first Spectropolarimetry, part of my thesis  I using the screen of my computer + the angle according to the effect of birefringence to obtain the detail of the image: the point between the solar corona and the ejection. Below to sees better.

Complete Pdf by my website. 

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