Product: Forecast Discussion Issued: 2019 Mar 19 1230 UTC Prepared by the U.S. Dept. of Commerce, NOAA, Space Weather Prediction Center
.24 hr Summary… Solar activity was at very low levels. Region 2735 (N03E11, Cro/beta) showed minor growth in the leading spot group, and was responsible for weak B-level X-ray enhancements. No Earth-directed CMEs were observed in available satellite imagery.
.Forecast… Solar activity is expected to continue at very low levels for the next three days (19-21 Mar).
.24 hr Summary… The greater than 2 MeV electron flux reached 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 19-21 Mar and the greater than 10 MeV proton flux is expected to maintain background levels.
.24 hr Summary… Solar wind parameters became slightly enhanced late in the period. Total field increased to 6 nT, and the Bz component reached a southward deflection of -5 nT. Density increased to a peak of 24.16 particles per cubic cm at approximately 0823 UTC, and wind speeds increased from around 330 km/s to 380 km/s. The phi angle was predominately negative, but ended the period in a positive solar sector.
.Forecast… Solar wind conditions are likely to continue to undergo enhancement over the course of 19 Mar due to a SSBC and subsequent CIR. On 20 Mar, enhanced conditions are anticipated to continue due to influence from a recurrent, positive polarity CH HSS. Near-background levels are expected again by 21 Mar.
.24 hr Summary… The geomagnetic field was quiet.
.Forecast… The geomagnetic field is expected to be at mostly quiet levels, with a chance of isolated unsettled periods, on day one (19 Mar). Quiet to unsettled conditions are expected on day two (21 Mar) due to anticipated influence from a recurrent, positive polarity CH HSS. Mostly quiet levels are expected again on 21 Mar with a return to background solar wind conditions.
Thank you for using the Product Subscription Service. If you would like to remove a product subscription or update the personal information in your account, go to: pss.swpc.noaa.gov. Please do not use the from address for correspondence, as it is not monitored. For comments or help, please contact us: email@example.com.