Joint USAF/NOAA Solar Geophysical Activity Report and Forecast 9 August 2019

Status Report From: Space Weather Prediction Center (NOAA)
Posted: Friday, August 9, 2019

Joint USAF/NOAA Solar Geophysical Activity Report and Forecast SDF Number 221 Issued at 2200Z on 09 Aug 2019 IA. Analysis of Solar Active Regions and Activity from 08/2100Z to 09/2100Z: Solar activity has been at very low levels for the past 24 hours. There are currently 0 numbered sunspot regions on the disk.

IB. Solar Activity Forecast: Solar activity is expected to be very low on days one, two, and three (10 Aug, 11 Aug, 12 Aug). IIA. Geophysical Activity Summary 08/2100Z to 09/2100Z: The geomagnetic field has been at quiet levels for the past 24 hours. Solar wind speed reached a peak of 636 km/s at 09/2032Z. Total IMF reached 7 nT at 09/2037Z. The maximum southward component of Bz reached -4 nT at 09/1441Z. Electrons greater than 2 MeV at geosynchronous orbit reached a peak level of 16327 pfu.

IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be at quiet to unsettled levels on days one and two (10 Aug, 11 Aug) and quiet levels on day three (12 Aug). III. Event probabilities 10 Aug-12 Aug Class M 01/01/01 Class X 01/01/01 Proton 01/01/01 PCAF green IV. Penticton 10.7 cm Flux Observed 09 Aug 067 Predicted 10 Aug-12 Aug 067/067/067 90 Day Mean 09 Aug 068 V. Geomagnetic A Indices Observed Afr/Ap 08 Aug 006/007 Estimated Afr/Ap 09 Aug 006/005 Predicted Afr/Ap 10 Aug-12 Aug 007/008-008/008-005/005 VI. Geomagnetic Activity Probabilities 10 Aug-12 Aug A. Middle Latitudes Active 15/15/10 Minor Storm 05/05/01 Major-severe storm 01/01/01 B. High Latitudes Active 15/15/15 Minor Storm 25/25/20 Major-severe storm 25/25/10

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