Space Weather Forecast - Discussion

Issued: 2019 Mar 18 1230 UTC
Prepared by the U.S. Dept. of Commerce, NOAA, Space Weather Prediction Center and processed by

Solar activity

24 h Summary
Solar activity was at very low levels. Newly numbered Region 2735 (N03E23, Bxo/beta) exhibited most of its development in the leader spot while the trailer spot ended the period in decay. No Earth-directed CMEs were observed in available satellite imagery.
Solar activity is expected to continue at very low levels for the next three days (18-20 Mar).

Energetic Particles

24 h Summary
The greater than 2 MeV electron flux reached moderate levels and the greater than 10 MeV proton flux remained at background levels.
The greater than 2 MeV electron flux is expected to be at normal to moderate levels on 18-20 Mar and the greater than 10 MeV proton flux is expected to maintain background levels.

Solar Wind

24 h Summary
Solar wind parameters, as measured by the DSCOVR spacecraft, reflected a return to nominal conditions. Total magnetic field strength decreased from a peak of 9 nT to at or below 5 nT after 18/0255 UTC. Bz was predominantly positive. Solar wind speeds declined from around 400 km/s to near 350 km/s by the periods end. Phi angle transitioned from the positive sector to the negative sector over the last half of the reporting period.
Solar wind conditions are likely to continue at ambient levels on 18-19 Mar. On 20 Mar, enhanced conditions are anticipated due to influence from a recurrent, positive polarity CH HSS.


24 h Summary
The geomagnetic field mostly quiet.
The geomagnetic field is expected to be at mostly quiet levels on days one and two (18-19 Mar). Quiet to unsettled conditions are expected on day three (20 Mar) due to anticipated influence from a recurrent CH HSS.

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Last X-flare:2017/09/10X8.2
Last M-flare:2017/10/20M1.0
Last geomagnetic storm:2019/03/17Kp5 (G1)
Number of spotless days in 2019:53
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