Joint USAF/NOAA Solar Geophysical Activity Report and Forecast 30 July 2020

Status Report From: Space Weather Prediction Center (NOAA)
Posted: Thursday, July 30, 2020

Joint USAF/NOAA Solar Geophysical Activity Report and Forecast SDF Number 212 Issued at 2200Z on 30 Jul 2020 IA. Analysis of Solar Active Regions and Activity from 29/2100Z to 30/2100Z: 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 on days one, two, and three (31 Jul, 01 Aug, 02 Aug). IIA. Geophysical Activity Summary 29/2100Z to 30/2100Z: The geomagnetic field has been at quiet levels for the past 24 hours. Solar wind speed reached a peak of 382 km/s at 29/2217Z. Total IMF reached 7 nT at 30/0405Z. The maximum southward component of Bz reached -7 nT at 30/0405Z. Electrons greater than 2 MeV at geosynchronous orbit reached a peak level of 230 pfu.

IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be at quiet levels on day one (31 Jul) and quiet to unsettled levels on days two and three (01 Aug, 02 Aug). III. Event probabilities 31 Jul-02 Aug Class M 01/01/01 Class X 01/01/01 Proton 01/01/01 PCAF green IV. Penticton 10.7 cm Flux Observed 30 Jul 073 Predicted 31 Jul-02 Aug 072/072/072 90 Day Mean 30 Jul 069 V. Geomagnetic A Indices Observed Afr/Ap 29 Jul 004/004 Estimated Afr/Ap 30 Jul 004/005 Predicted Afr/Ap 31 Jul-02 Aug 006/005-007/008-008/010 VI. Geomagnetic Activity Probabilities 31 Jul-02 Aug A. Middle Latitudes Active 10/25/35 Minor Storm 01/05/10 Major-severe storm 01/01/01 B. High Latitudes Active 20/15/15 Minor Storm 20/30/30 Major-severe storm 10/30/45

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