Solar 
              X-rays:  
              Geomagnetic Field:  | 
              
              
               | 
            
          
         
        
 
        
        
        
          and the X-ray flux reached a peak of 
          1.5 x 10 sup -3 
        
        
          
            
              | X-Ray Flux | 
                | 
                | 
            
            
              
                | 
            
          
         
        
          which is about 5 orders of magnitude 
          stronger than normal. 
        
        
           
        
          Apparently it was proton flare since 
          GOES 8 started measuring elevated proton flux immediately:
        
        
          Oh, the proton flux was already 
          elevated from the previous event 2 days ago.
        
           
        
        
          
          SEVERE SOLAR ACTIVITY: 
          The most powerful solar flare in 14 years, a remarkable
          
          X18-category explosion, erupted from sunspot 486 this morning at 
          approximately 1110 UT. A strong solar radiation storm is in progress. 
          (Click here 
          to learn about the effects of such storms.) The explosion hurled a 
          coronal mass ejection almost directly toward Earth, which could 
          trigger bright auroras when it arrives on Oct 29th or 30th.
          
          
          
          Above: 
          This SOHO
          
          coronagraph image captured at 12:18 UT 
          shows the coronal mass ejection of Oct. 28th billowing directly toward 
          Earth. Such clouds are called
          halo CMEs. 
          The many speckles are solar protons striking the coronagraph's CCD 
          camera.
 
        
           
        
        
          He's starting to use words like 
          "unprecedented", "extremely severe"...
        
           
        
           
        
          Marcia