Joint USAF/NOAA Solar Geophysical Activity Report and Forecast
SDF Number 145 Issued at 2200Z on 25 May 2015
IA. Analysis of Solar Active Regions and Activity from 24/2100Z to 25/2100Z: Solar activity has been at very low levels for the past 24 hours. There are currently 5 numbered sunspot regions on the disk.
IB. Solar Activity Forecast: Solar activity is expected to be very low with a chance for a C-class flares on days one, two, and three (26 May, 27 May, 28 May).
IIA. Geophysical Activity Summary 24/2100Z to 25/2100Z: 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 368 km/s at 25/0124Z.
IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be at quiet levels on days one and two (26 May, 27 May) and quiet to unsettled levels on day three (28 May).
III. Event probabilities 26 May-28 May
Class M 01/01/01
Class X 01/01/01
IV. Penticton 10.7 cm Flux
Observed 25 May 097
Predicted 26 May-28 May 100/100/095
90 Day Mean 25 May 127
V. Geomagnetic A Indices
Observed Afr/Ap 24 May 006/005
Estimated Afr/Ap 25 May 004/005
Predicted Afr/Ap 26 May-28 May 006/005-006/005-007/008
VI. Geomagnetic Activity Probabilities 26 May-28 May