From: Space Weather Prediction Center (NOAA)
Posted: Wednesday, May 22, 2019
Joint USAF/NOAA Solar Geophysical Activity Report and Forecast SDF Number 142 Issued at 2200Z on 22 May 2019 IA. Analysis of Solar Active Regions and Activity from 21/2100Z to 22/2100Z: 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 (23 May, 24 May, 25 May). IIA. Geophysical Activity Summary 21/2100Z to 22/2100Z: The geomagnetic field has been at quiet levels for the past 24 hours. Solar wind speed reached a peak of 398 km/s at 22/0237Z. Electrons greater than 2 MeV at geosynchronous orbit reached a peak level of 166 pfu.
IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be at quiet levels on days one and two (23 May, 24 May) and quiet to unsettled levels on day three (25 May). III. Event probabilities 23 May-25 May Class M 01/01/01 Class X 01/01/01 Proton 01/01/01 PCAF green IV. Penticton 10.7 cm Flux Observed 22 May 067 Predicted 23 May-25 May 068/068/068 90 Day Mean 22 May 072 V. Geomagnetic A Indices Observed Afr/Ap 21 May 004/004 Estimated Afr/Ap 22 May 005/006 Predicted Afr/Ap 23 May-25 May 006/005-006/005-007/008 VI. Geomagnetic Activity Probabilities 23 May-25 May A. Middle Latitudes Active 10/10/25 Minor Storm 01/01/05 Major-severe storm 01/01/01 B. High Latitudes Active 15/15/20 Minor Storm 20/20/30 Major-severe storm 15/15/25
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