Solar activity forecast for the period April 13 - April 19, 2018


Activity level: mostly very low
X-ray background flux (1.0-8.0 A): in the range A1.5-A2.7
Radio flux (10.7 cm): a fluctuation in the range 67-73 f.u.
Events: class C (0-1/period), class M (0/period), class X (0/period), proton (0/period)
Relative sunspot number (Ri): in the range 0-35

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

Geomagnetic activity forecast for the period April 13 - April 19, 2018


Quiet: Apr 15 - 19
Unsettled: Apr 13 - 17
Active: unlikely Apr 13, 15 - 17
Minor storm:  0
Major storm: 0
Severe storm: 0

Geomagnetic activity summary:
At the Budkov observatory, we had been recorded two active episodes at April 9 and 10. 
Next three days, we expect the nominal geomagnetic activity at the unsettled level. 
Then, hand-to hand to coronal hole HSS waning, since Sunday, April 15, we expect 
at most quiet conditions return.

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


Geomagnetic activity forecast for the period April 13 - May 8, 2018

Geomagnetic field will be:
quiet on April 24 - 25, 28 
mostly quiet on April 23, 26, May 4 
quiet to unsettled on April 17 - 18, 27, 29 - 30, May 1, 3, 5, 9 
quiet to active on April 13, 15 - 16, 19, May 2, 6, 8 
active to disturbed on April 14, (20 - 21,) May 7 

Solar wind will intensify on April (24 - 25,) May 5 - 7, (8) 

Remark:
- Parenthesis means lower probability of activity enhancement.
- With regard to ongoing changes, current forecasts are less reliable again.
- Beware of paraskavedekatriafobia tomorrow!

F. K. Janda, OK1HH
(from Czech Propagation Interested Group
compiling this geomagnetic activity weekly forecasts since 1978).
e-mail: ok1hh(at)rsys.cz