Product: Forecast Discussion Issued: 2020 Apr 02 0030 UTC Prepared by the U.S. Dept. of Commerce, NOAA, Space Weather Prediction Center
.24 hr Summary… Very low solar activity continued despite additional development in Region 2759 (N28E38, Hrx/alpha). Region 2759 evolved further, gaining rudimentary penumbra; however, the spot group remained in a simple unipolar configuration with very weak shear. No Earth-directed CMEs were observed in available coronagraph imagery.
.Forecast… Solar activity is expected to remain very low 2-4 Apr due to the persistent lack of activity and simple magnetic nature of Region 2759.
.24 hr Summary… The greater than 2 MeV electron flux was primarily moderate, with a few brief occurrences of high levels – but not frequent or long enough in duration to warrant a high flux level alert. The greater than 10 MeV proton flux maintained background levels.
.Forecast… The greater than 2 MeV electron flux is expected to be primarily moderate, with brief high level periods likely 2-4 Apr. The greater than 10 MeV proton flux is expected to continue at background.
.24 hr Summary… Solar wind parameters were indicative of the waning influences of an isolated, negative polarity CH HSS. Total IMF strength was weak at 2 to 4 nT and the Bz component underwent mainly weak deviations. Solar wind speed unsteadily decreased from ~500 km/s to near 425 km/s. The phi angle was predominantly negative.
.Forecast… The solar wind field is expected to weaken further, with occasional periods of minor disturbances and enhancements 2-3 Apr due to flanking influences of the south polar, negative polarity CH HSS. Conditions are anticipated to return to near ambient-background conditions on 4 Apr as any HSS influences are likely to pass further south of Earth.
.24 hr Summary… The geomagnetic field was quiet to unsettled in decreased response to waning CH HSS effects.
.Forecast… Quiet to unsettled conditions are expected 2-3 Apr in response to occasional solar wind field disturbances. Primarily quiet conditions are expected 4 Apr as CH HSS influences decrease further.
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