Solar activity forecast for the period March 22 - March 28, 2019

Activity level: mostly low (22.-24.3.), very low (25.- 28.3.) 
X-ray background flux (1.0-8.0 A): in the range A5.0-B2.2 (22.-24.3.), A0.0 - A1.9 (25.- 28.3.) 
Radio flux (10.7 cm): a fluctuation in the range 68-76 f.u.
Events: class C (1-5/period), class M (0/period), class X (0/period), proton (0/period)
Relative sunspot number (Ri): in the range 0-50

Martina Exnerova
RWC Prague, Astronomical Institute, Solar Dept., Ondrejov, Czech Republic
e-mail: sunwatch(at)asu.cas.cz

Geomagnetic activity forecast for the period March 22 - March 28, 2019

Quiet: Mar 22, 26 - 27
Unsettled: Mar 24 - 27
Active: 23 - 24, 27 - 28
Minor storm: Mar 23, 28
Major storm: 0
Severe storm: 0

Geomagnetic activity summary:
Because of the last CME, we expect active conditions arrival at Saturday, March 23. This 
day, a minor storm effect is probable in our latitudes. Following days, generally, we 
expect geomagnetic activity decrease to unsettled level and, about March 26, the decrease 
can reach a short quiet episode.
The last day of forecasted period, March 28, the active conditions return is possible. 
Nevertheless, we do not expect exceeding of the local K-index at value 4.

Tomas Bayer
RWC Prague
Institute of Geophysics of the ASCR, Prague
Department of Geomagnetism
Budkov observatory (BDV)

Weekly Commentary on the Sun, the Magnetosphere, and the Earth's Ionosphere March 22 - April 20, 2019

Geomagnetic field will be: 
quiet on March 31, April 11, 16, 18 - 19 
quiet to unsettled on March 22, 25, April 1 - 4, 11 - 12 
quiet to active on March 26, 31, April 6 - 10, 15 
unsettled to active on March 24, 27, 29 - 30, April 5, 13 - 14, 17 
active to disturbed on March 23, 28 
 
Solar wind will intensify on on March (22,) 23 - 24. (25 - 30,) 
April (2, 12 - 13, 15 - 16) 
 
Remark: 
- Parenthesis means lower probability of activity enhancement. 
 
F. K. Janda, OK1HH 
(from Czech Propagation Interested Group 
compiling this geomagnetic activity weekly forecasts since January 1978). 
e-mail: ok1hh(at)rsys.cz