Tällä sivulla voit lukea NOAA SWPC:n julkaisemat kommentit auringon havaitusta aktiivisuudesta edellisen vuorokauden kohdalta sekä muutaman seuraavan vuorokauden kattavan ennusteen. Uusin alkuperäinen julkaisu on luettavissa täällä. Tiedot päivittyvät kaksi kertaa vuorokaudessa.
Solar activity was at low levels. Region 4095 (S06W71, Dai/beta-gamma) produced the largest flare of the period, a C2.4 at 22/2241 UTC. The region has the most complex magnetic classification of the front-sided groups as a beta-gamma group. Region 4087 (N15W57, Hsx/alpha) underwent decay and lost its trailer spots. New Regions 4096 (N06E57, Hsx/alpha) and 4097 (S13E63, Cro/beta) were numbered this period. All other regions were either stable or in decay. There have been no Earth-directed CMEs in available coronagraph imagery. .
Solar flare activity is expected to remain low as most regions on the disk are fairly simple in their magnetic complexities. There remains a chance for R1-R2 (Minor-Moderate) through 25 May.
Solar wind parameters reflected persistent CH HSS influence. Total field has been between 4-9 nT for most of the period while the Bz component oscillated between +7/-5 nT. Solar wind speeds gradually decreased from ~575 to ~475-500 km/s. Phi was mostly positive.
Solar wind parameters will likely continue to see effects from the CH HSS through 25 May with waning influences 24 May. Model guidance indicates wind speeds will drop from around 520 km/s to 360 km/s during this transition. An enhancement of the solar wind is likely on 23 May due to a possible glancing blow from the filament eruption that occurred on 17 May.
The geomagnetic field has been at quiet levels.
Quiet to unsettled conditions are likely through 25 May, with a chance for active levels, all due to continued effects from a positive polarity CH HSS stream and possible weak effects from arrival of the 17 May CME.