A MAGNETIC STORM WILL HIT EARTH AT THE END OF THE WEEK, A WEAK, MEDIUM-SIZED MAGNETIC STORM (G1 TO G2) IS EXPECTED. THE STORM IS NOW EXPECTED TO BE RELATIVELY SHORT AND LASTS ABOUT 12-15 HOURS. THE BEGINNING IS SET IN A SYNTHETIC MANNER AT NIGHT FROM FRIDAY TO SIT, AND THE MAJOR GEOMAGNETIC FLUCTUATIONS WILL BE IN THE FIRST HALF OF A LAB SATURDAY FOR SOLAR ASTRONOMY IKI RAS TG