Joint USAF/NOAA Solar Geophysical Activity Report and Forecast
SDF Number 117 Issued at 2200Z on 27 Apr 2015
IA. Analysis of Solar Active Regions and Activity from 26/2100Z to 27/2100Z: Solar activity has been at very low levels for the past 24 hours. There are currently 3 numbered sunspot regions on the disk.
IB. Solar Activity Forecast: Solar activity is likely to be low on days one, two, and three (28 Apr, 29 Apr, 30 Apr).
IIA. Geophysical Activity Summary 26/2100Z to 27/2100Z: The geomagnetic field has been at quiet levels for the past 24 hours. Solar wind speed, as measured by the ACE spacecraft, reached a peak speed of 370 km/s at 27/1644Z. Total IMF reached 7 nT at 27/1131Z. The maximum southward component of Bz reached -6 nT at 27/0935Z. Electrons greater than 2 MeV at geosynchronous orbit reached a peak level of 874 pfu.
IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be at quiet levels on day one (28 Apr) and quiet to unsettled levels on days two and three (29 Apr, 30 Apr).