Report of Solar Geophysical Activity (RSGA)

By Newsroom America Feeds at 2 May 2017

Joint USAF/NOAA Solar Geophysical Activity Report and Forecast SDF Number 122 Issued at 2200Z on 02 May 2017

IA. Analysis of Solar Active Regions and Activity from 01/2100Z to 02/2100Z: Solar activity has been at very low levels for the past 24 hours. There are currently 2 numbered sunspot regions on the disk. IB. Solar Activity Forecast: Solar activity is expected to be very low with a slight chance for a C-class flare on days one, two, and three (03 May, 04 May, 05 May).

IIA. Geophysical Activity Summary 01/2100Z to 02/2100Z: The geomagnetic field has been at quiet levels for the past 24 hours. Solar wind speed reached a peak of 453 km/s at 02/1839Z. Total IMF reached 7 nT at 02/1104Z. The maximum southward component of Bz reached -3 nT at 02/0252Z. Electrons greater than 2 MeV at geosynchronous orbit reached a peak level of 8388 pfu. IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be at quiet to active levels on days one and two (03 May, 04 May) and quiet to unsettled levels on day three (05 May).

III. Event probabilities 03 May-05 May Class M 01/01/01 Class X 01/01/01 Proton 01/01/01 PCAF green

IV. Penticton 10.7 cm Flux Observed 02 May 077 Predicted 03 May-05 May 078/077/077 90 Day Mean 02 May 077

V. Geomagnetic A Indices Observed Afr/Ap 01 May 005/007 Estimated Afr/Ap 02 May 006/007 Predicted Afr/Ap 03 May-05 May 009/012-011/012-008/008

VI. Geomagnetic Activity Probabilities 03 May-05 May A. Middle Latitudes Active 30/30/15 Minor Storm 10/10/05 Major-severe storm 01/01/01 B. High Latitudes Active 15/15/15 Minor Storm 30/30/25 Major-severe storm 40/40/20


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