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 as Region 3204 (N24W86, Cao/beta) produced a C3.4 flare at 01/1801 UTC followed later by a C5.8 flare at 01/2248 UTC , the largest of the period. Region 3207 (S11E59, Cao/beta) produced a C1.0 flare at 01/0104 UTC and a C1.8/Sf at 01/0128 UTC. Region 3207 exhibited growth in its intermediate and trailer spots, while the remaining regions were mostly stable. New Region 3208 (N16E51, Cro/beta) was numbered during the period, but was mostly stable and inactive. A large prominence eruption and associated CME was observed beginning near 01/0600 UTC off the NNW limb. This event originated on the far side of the disk and is not Earth-directed.
Solar activity is expected to be low, with a slight chance for M-class flares (R1-R2 Minor-Moderate) on 02-04 Feb, mostly due to activity from Region 3207.
Solar wind parameters reflected a mostly nominal solar wind regime through around 01/1800 UTC. Just after 01/1800 UTC, total field increased to eventually peak near 11 nT, Bz saw a pronounced southward deviation to -10 nT and solar wind speeds increased to near 440 km/s. Phi remained in a solidly negative orientation.
Periodic enhancements in the solar wind parameters are possible on 02 Feb with suspected CH HSS influence. Late on 03 Feb, CH HSS effects are expected to begin a gradual decline, returning to a more background-like state by late 03 Feb/early 04 Feb.
The geomagnetic field was mostly quiet, with isolated unsettled periods.
The geomagnetic field is expected to be mostly quiet to unsettled, with isolated active periods, on 02 Feb. By 03 Feb, activity is expected to gradually diminish as negative polarity CH HSS gradually subsides.