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 very low to low levels. Both Regions 3038 (N16W80, Eso/beta) and 3040 (S13E09, Cso/beta) were responsible for low level C-class flares. The largest flare of the period was a C2 flare at 26/0812 UTC from Region 3040. Slight decay was observed in Region 3038 as it approached the west limb while Region 3040 was relatively stable. Other activity of note included an approximate 35 degree filament eruption centered near S53W50 that began at 26/0128 UTC in SUVI 304 imagery. Approximately the same time as this filament lifted off, loop structures could be seen in SUVI 171 imagery that appear to be a backside CME which was accelerating faster than the filament eruption. Beginning at 26/0336 UTC in SOHO/LASCO C2 imagery, a partial halo CME was observed. Initial fits of this CME show a backside bias. However, a much slower frontside CME cannot be ruled out. Due to the filaments direction of travel, the majority of the ejecta is likely well south of the ecliptic. Further analysis is on-going.
Solar activity is likely to be low with a slight chance for M-class flares (R1-R2, Minor-Moderate) through 27 Jun. Very low activity is expected on 28 Jun as Region 3038 rotates beyond the W limb.
Solar wind parameters were enhanced likely due to CIR effects preceding a negative polarity CH HSS. Total field ranged from 2-14 nT while the Bz component was between +8/-12 nT. Solar wind speed increased from approximately 405 km/s to near 555 km/s. Phi angle was mostly negative.
Enhancements to the solar wind parameters are expected to continue through 28 Jun due to CH HSS influence. An additional enhancement from the periphery of a CME that left the Sun on 24 Jun is likely on 28 Jun.
The geomagnetic field was at quiet to G1 (Minor) storm levels due to likely CIR effects preceding a negative polarity CH HSS.
The geomagnetic field is expected to be at quiet to G1 (Minor) geomagnetic storm levels on 26 Jun followed by unsettled to active levels on 27 Jun due to persistent CH HSS effects. Unsettled to active levels are also possible late on 28 Jun due to an interaction with the periphery of the 24 Jun CME.