Joint USAF/NOAA Solar Geophysical Activity Report and Forecast
SDF Number 179 Issued at 2200Z on 28 Jun 2015
IA. Analysis of Solar Active Regions and Activity from 27/2100Z to 28/2100Z: Solar activity has been at low levels for the past 24 hours. The largest solar event of the period was a C1 event observed at 28/1714Z from Region 2373 (N15E67). There are currently 3 numbered sunspot regions on the disk.
IB. Solar Activity Forecast: Solar activity is likely to be moderate with a slight chance for an X-class flare on day one (29 Jun) and expected to be very low with a chance for a C-class flares on days two and three (30 Jun, 01 Jul).
IIA. Geophysical Activity Summary 27/2100Z to 28/2100Z: 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 565 km/s at 28/0253Z. Total IMF reached 8 nT at 27/2156Z. The maximum southward component of Bz reached -7 nT at 27/2219Z. Protons greater than 10 MeV at geosynchronous orbit reached a peak level of 8 pfu at 28/0215Z. Electrons greater than 2 MeV at geosynchronous orbit reached a peak level of 6994 pfu.
IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be at quiet to unsettled levels on day one (29 Jun) and quiet levels on days two and three (30 Jun, 01 Jul). Protons greater than 10 Mev have a slight chance of crossing threshold on day one (29 Jun) and have a slight chance of crossing threshold on day two (30 Jun).
