Solar activity forecast for the period September 29 - October 5,
2017
Activity level: very low to low
X-ray background flux
(1.0-8.0 A): in the range A5.5-B5.5
Radio flux (10.7 cm): a fluctuation in
the range 72-95 f.u.
Events: class C (0-7/period), class M (0-2/period),
class X (0/period), proton (0/period)
Relative sunspot number (Ri): in the
range 22-90
Martina Exnerova
RWC Prague, Astronomical Institute, Solar
Dept., Ondrejov, Czech Republic
e-mail:
sunwatch(at)asu.cas.cz
Geomagnetic activity forecast for the period
September 28 - October 5, 2017
Quiet: Oct 2 - 4
Unsettled: Oct 1 -
5
Active: Sep 28 - 30, Oct 1
Minor storm: Sep 28
Major storm:
0
Severe storm: 0
Geomagnetic activity summary:
Currently (Sep 27
evenings), the active episode is beginning and we expect
its culminating at
September 28. The next two days, we expect at most
unsettled conditions with
probable active event. Further, since October 1,
we expect quiet to unsettled
conditions return. An isolated active episode
is also possible about October
1-2.
Tomas Bayer
RWC Prague
Institute of Geophysics of the ASCR,
Prague
Department of Geomagnetism
Budkov observatory
(BDV)
Geomagnetic activity forecast for the period September 29 - October
25, 2017
Geomagnetic field will be:
quiet on October 6, 23
mostly quiet on October 5
quiet to unsettled October 3, 10, 16 - 21
quiet to active on September 29 - 30, October 2, 4, 7 - 8, 11, 14 - 15, 22,
24
active to disturbed on October 1, 9, 12 - 13, 25
Amplifications
of the solar wind, mostly from coronal holes, are expected
on September 29
(- 30), October (1, 3, 6,) 11 - 16, (17 - 18, 21 - 22, 24,) 25
Remark:
- New activity on the Sun can dramatically change real
development. Which
has been happening more often lately.
- 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 January 1978
e-mail:
ok1hh(at)rsys.cz
