Solar activity forecast for the period May 26 - June 1, 2017


Activity level: mostly very low to low
X-ray background flux (1.0-8.0 A): in the range A4.5-B1.5
Radio flux (10.7 cm): a fluctuation in the range 68-90 f.u.
Events: class C (0-5/period), class M (0/period), class X (0/period), proton (0/period)
Relative sunspot number (Ri): in the range 0-75

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


Geomagnetic activity forecast for the period May 26 - June 1, 2017


Quiet: May 26 - 31
Unsettled: May 27 - 28, 31, Jun 1
Active:   0
Minor storm: 0
Major storm: 0
Severe storm: 0

Geomagnetic activity summary:
Next week, we expect at most quiet to unsettled conditions. The coming
three days, the magnetic field should be quiet with isolated unsettled
periods. Then, the unsettled episodes are expected to waning, since
Monday, May 29, we expect at most quiet conditions. The last days, quiet
to unsettled level is probable.

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


Geomagnetic activity forecast for the period May 26 - June 21, 2017


Geomagnetic field will be: 
quiet on June 10, 
mostly quiet on May 31, June 11, 
quiet to unsettled May 26 - 27, 30, June 3, 6 - 8, 14, 19
quiet to active on May 28 - 29, June 4 - 5, 15, 20
active to disturbed on June (1 - 2, 9,) 12 - 13, 16 - 18
 
Amplifications of the solar wind from coronal holes are expected 
on May (30,) June (5 - 6,) 12 - 14, 16 - 18 
 
Remark:
- Parenthesis means lower probability of activity enhancement and/or 
lower reliability of prediction. 
 
F. K. Janda, OK1HH 
Czech Propagation Interested Group 
OK1HH compiling weekly forecasts since 1978 
e-mail: ok1hh(at)rsys.cz