Joint USAF/NOAA Solar Geophysical Activity Report and Forecast 13 August 2019

Status Report From: Space Weather Prediction Center (NOAA)
Posted: Tuesday, August 13, 2019

Joint USAF/NOAA Solar Geophysical Activity Report and Forecast SDF Number 225 Issued at 2200Z on 13 Aug 2019 IA. Analysis of Solar Active Regions and Activity from 12/2100Z to 13/2100Z: 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 (14 Aug, 15 Aug, 16 Aug). IIA. Geophysical Activity Summary 12/2100Z to 13/2100Z: The geomagnetic field has been at quiet levels for the past 24 hours. Solar wind speed reached a peak of 512 km/s at 13/1720Z. Total IMF reached 12 nT at 13/1223Z. The maximum southward component of Bz reached -6 nT at 13/1159Z. Electrons greater than 2 MeV at geosynchronous orbit reached a peak level of 5336 pfu.

IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be at quiet levels on days one and two (14 Aug, 15 Aug) and quiet to unsettled levels on day three (16 Aug). III. Event probabilities 14 Aug-16 Aug Class M 01/01/01 Class X 01/01/01 Proton 01/01/01 PCAF green IV. Penticton 10.7 cm Flux Observed 13 Aug 067 Predicted 14 Aug-16 Aug 067/067/067 90 Day Mean 13 Aug 068 V. Geomagnetic A Indices Observed Afr/Ap 12 Aug 007/005 Estimated Afr/Ap 13 Aug 006/006 Predicted Afr/Ap 14 Aug-16 Aug 005/005-006/005-007/008 VI. Geomagnetic Activity Probabilities 14 Aug-16 Aug A. Middle Latitudes Active 05/05/10 Minor Storm 01/01/01 Major-severe storm 01/01/01 B. High Latitudes Active 15/15/15 Minor Storm 15/15/25 Major-severe storm 05/05/10

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