Joint USAF/NOAA Solar Geophysical Activity Report and Forecast
SDF Number 151 Issued at 2200Z on 31 May 2015
IA. Analysis of Solar Active Regions and Activity from 30/2100Z to 31/2100Z: Solar activity has been at very low levels for the past 24 hours. There are currently 4 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 (01 Jun, 02 Jun, 03 Jun).
IIA. Geophysical Activity Summary 30/2100Z to 31/2100Z: 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 417 km/s at 31/0021Z. Total IMF reached 8 nT at 31/1502Z. The maximum southward component of Bz reached -5 nT at 31/1407Z.
IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be at quiet levels on days one, two, and three (01 Jun, 02 Jun, 03 Jun).
III. Event probabilities 01 Jun-03 Jun
Class M 05/05/05
Class X 01/01/01
Proton 01/01/01
PCAF green
IV. Penticton 10.7 cm Flux
Observed 31 May 094
Predicted 01 Jun-03 Jun 095/100/105
90 Day Mean 31 May 125
V. Geomagnetic A Indices
Observed Afr/Ap 30 May 005/005
Estimated Afr/Ap 31 May 005/005
Predicted Afr/Ap 01 Jun-03 Jun 006/005-006/005-006/005
VI. Geomagnetic Activity Probabilities 01 Jun-03 Jun
