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Joint USAF/NOAA Solar Geophysical Activity Report and Forecast 1 April 2019

Status Report From: Space Weather Prediction Center (NOAA)
Posted: Monday, April 1, 2019

Joint USAF/NOAA Solar Geophysical Activity Report and Forecast SDF Number 91 Issued at 2200Z on 01 Apr 2019 IA. Analysis of Solar Active Regions and Activity from 31/2100Z to 01/2100Z: Solar activity has been at very low levels for the past 24 hours. There are currently 1 numbered sunspot regions on the disk.

IB. Solar Activity Forecast: Solar activity is expected to be very low on days one, two, and three (02 Apr, 03 Apr, 04 Apr). IIA. Geophysical Activity Summary 31/2100Z to 01/2100Z: The geomagnetic field has been at quiet to active levels for the past 24 hours. Solarwind speed reached a peak of 426 km/s at 31/2337Z. Total IMF reached 7 nT at 01/0741Z. The maximum southward component of Bz reached -6 nT at 01/0738Z. Electrons greater than 2 MeV at geosynchronous orbit reached a peak level of 122 pfu.

IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be at quiet to unsettled levels on days one, two, and three (02 Apr, 03 Apr, 04 Apr). III. Event probabilities 02 Apr-04 Apr Class M 01/01/01 Class X 01/01/01 Proton 01/01/01 PCAF green IV. Penticton 10.7 cm Flux Observed 01 Apr 069 Predicted 02 Apr-04 Apr 070/070/070 90 Day Mean 01 Apr 071 V. Geomagnetic A Indices Observed Afr/Ap 31 Mar 009/010 Estimated Afr/Ap 01 Apr 010/013 Predicted Afr/Ap 02 Apr-04 Apr 007/008-008/010-007/010 VI. Geomagnetic Activity Probabilities 02 Apr-04 Apr A. Middle Latitudes Active 20/20/20 Minor Storm 05/05/05 Major-severe storm 01/01/01 B. High Latitudes Active 15/15/15 Minor Storm 25/30/30 Major-severe storm 25/30/30


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