Matej, OK1TEH
28. 05. 2017, 08:46:20  

Aurora na 2m po 14utc mozna i v ok viz 

 May 27, 2017 @ 22:20 UTC 
 CME Passage / Bz South / G2 Storm (UPDATED) 
 A fairly weak shock passage was observed today by the DSCOVR spacecraft. A minor geomagnetic 
 enhancement will be possible during the next 24 hours. A widespread disturbance is not 
 currently expected. 

 UPDATE: The Bz component of the interplanetary magnetic field (IMF) continues to point sharply 
 south (-20nT), a condition known to enhance geomagnetic activity. Moderate (G2) storming is now 
 being observed at higher latitudes. Sky watchers should be alert for visible aurora once dark outside. 

 ALERT: Geomagnetic K-index of 6 
 Threshold Reached: 2017 May 27 2322 UTC 
 Synoptic Period: 2100-2400 UTC 
 Active Warning: Yes 
 NOAA Scale: G2 - Moderate 

 SUMMARY: Geomagnetic Sudden Impulse 
 Observed: 2017 May 27 1536 UTC 
 Deviation: 19 nT 
 Station: BOU