Product: Forecast Discussion Issued: 2019 May 22 0030 UTC Prepared by the U.S. Dept. of Commerce, NOAA, Space Weather Prediction Center
.24 hr Summary… Solar activity remained very low. There were no sunspots on the visible disk, and no Earth-directed CME’s were observed in available coronagraph imagery.
.Forecast… Solar activity is expected to remain very low on 22-24 May.
.24 hr Summary… The greater than 2 MeV electron flux was at normal to moderate levels and the greater than 10 MeV proton flux remained at background levels.
.Forecast… The greater than 2 MeV electron flux is expected to be at normal to moderate levels on 22-24 May. The greater than 10 MeV proton flux is expected to continue at background levels.
.24 hr Summary… Solar wind measurements from DSCOVR were close to background levels. Total field strength was generally less than 5 nT, and Bz was unremarkable. Wind speeds averaged around 380 km/s, and the phi angle was in a positive orientation.
.Forecast… Minor enhancements in the solar wind are anticipated on 22 May with a series of weak, recurrent, negative polarity CH HSS’s. Near-background conditions are expected on 23-24 May.
.24 hr Summary… The geomagnetic field was quiet.
.Forecast… The geomagnetic field is expected to be at quiet to unsettled levels on 22 May as a result of weak, recurrent, negative polarity CH HSS’s. A return to mostly quiet levels is anticipated by 23 May, and is expected to continue into 24 May.
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