Subject: Weekly Forecasts Bulletin
Solar activity forecast for the
period April 15 - April 21, 2016
Activity level: mostly low
X-ray
background flux (1.0-8.0 A): in the range A9.0-B6.0
Radio flux (10.7 cm): a
fluctuation in the range 90-115 f.u.
Events: class C (0-5/day), class M
(0-2/period), class X (0/period), proton (0/period)
Relative sunspot number
(Ri): in the range 15-100
Tomas Blaha
RWC Prague, Astronomical
Institute, Solar Dept., Ondrejov, Czech Republic
e-mail:
sunwatch(at)asu.cas.cz
Geomagnetic activity forecast for the period April
15 - April 21, 2016
Quiet: Apr 19 - 21
Unsettled: Apr 15 -
18
Active: possible but unlikely Apr 17 - 18
Minor storm: 0
Major
storm:0
Severe storm: 0
Geomagntic activity summary:
Maximum of
geomagnetic activity has been recorded at Apr 12-13 when the
local K-index
reached K=5. The active conditions continued till morning
Apr 14, then turned
to unsettled.
Next week, we expect at most quiet to unsettled conditions only
with
possible active episode between Apr 17-18. Nevertheless, it may be only
an
isolated event. Then, we expect return of quiet to unsettled
level.
Tomas Bayer
RWC Prague
Institute of Geophysics of the ASCR,
Prague
Department of Geomagnetism
Budkov observatory
(BDV)
Geomagnetic activity forecast for the period April 15 - May 11,
2016
Geomagnetic field will be:
quiet on April 21 - 22, May 6 -
7
mostly quiet on April 17 - 18, 27 - 28, May 1 - 3, 8
quiet to unsettled
on April 15 - 16, 19 - 20, 25 - 26, May 11
quiet to active on April 23 - 24,
29 - 30, May 4 - 5, 9 - 10
active to disturbed on May (9 -
10)
Amplifications of the solar wind from coronal holes are
expected:
on April 18 - 20, 23 - 24, 28 - 30, May 4 - 5, 8 -
11
Remarks:
- Parenthesis means lower probability of activity
enhancement.
Petr Kolman, OK1MGW, Czech Propagation Interested
Group
(OK1HH & OK1MGW, weekly forecasts since 1978)
e-mail:
kolmanp(at)razdva.cz (via Dario Monferini, April 16, DXLD)
