Weekly forecast

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)

Geomagnetic activity forecast for the period 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 

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