Joint USAF/NOAA Solar Geophysical Activity Report and Forecast
SDF Number 99 Issued at 2200Z on 09 Apr 2015
IA. Analysis of Solar Active Regions and Activity from 08/2100Z to 09/2100Z: Solar activity has been at low levels for the past 24 hours. The largest solar event of the period was a C6 event observed at 09/1901Z from Region 2320 (S12W25). There are currently 2 numbered sunspot regions on the disk.
IB. Solar Activity Forecast: Solar activity is likely to be low with a slight chance for an M-class flare on days one, two, and three (10 Apr, 11 Apr, 12 Apr).
IIA. Geophysical Activity Summary 08/2100Z to 09/2100Z: The geomagnetic field has been at quiet to unsettled levels for the past 24 hours. Solar wind speed, as measured by the ACE spacecraft, reached a peak speed of 429 km/s at 09/1453Z. Total IMF reached 14 nT at 09/2034Z. The maximum southward component of Bz reached -8 nT at 09/0928Z. Electrons greater than 2 MeV at geosynchronous orbit reached a peak level of 271 pfu.
IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be at quiet to minor storm levels on day one (10 Apr), quiet to unsettled levels on day two (11 Apr) and quiet levels on day three (12 Apr).
