Solar activity forecast for the period March 24 - March 30, 2017


Activity level: mostly very low to low
X-ray background flux (1.0-8.0 A): in the range A4.0-A9.5
Radio flux (10.7 cm): a fluctuation in the range 60-90 f.u.
Events: class C (0-1/day), class M (0/period), class X (0/period), proton (0/period)
Relative sunspot number (Ri): in the range 0-65

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


Geomagnetic activity forecast for the period March 24 - March 30, 2017


Quiet: Mar 25 - 26
Unsettled: Mar 23 - 24, 27, 30
Active:  Mar 27 - 30
Minor storm: Mar 27 - 28
Major storm: 0
Severe storm: 0

Geomagnetic activity summary:
After the last active event (March 21-22 when the local K-index reached
K=4) we expect the main active to minor strom effect at the end of
forecasted period (e.g. March 27-29). 27 days ago, the magnetic activity
reached the minor storm level by significant synoptic maps similarity and
the local K-index reached the value 5.
We expect unsettled conditions the next two days (Fri - Sat March 24 -
25). Then, we ecpect activity decrease to quiet to unsettled level (March
26 - 27) till the active/minor storming possibility event expected to the
rest of forecasted period.


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


Geomagnetic activity forecast for the period March 24 - April 19, 2017


Geomagnetic field will be:
quiet on March 25, April 8 - 9, 14 - 15 
mostly quiet on April 13, 19 
quiet to unsettled March 26 - 28, April 10, 12, 18 
quiet to active on March 24, 31, April 1 - 4, 6, 11, 17 
active to disturbed on March 29 - 30, April 5, 7, 16 

Amplifications of the solar wind from coronal holes are expected
on March 24, 30 - 31, April 1 - 4, (5 - 8,) 12 - 13. (14,) 16 - 20 

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