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 levels. Slight decay was observed in the trailing spots of Region 2902 (N18W46, Cro/beta) while growth was observed in the trailing spots of Region 2898 (S26W88, Cso/beta). Other activity included an approximate 25 degree filament eruption centered near N30W20 observed in SDO/AIA 304 imagery beginning at 03/0512 UTC. A likely associated CME was observed in STEREO A COR2 imagery at 03/1224 UTC. LASCO coronagraph imagery showed a possible faint CME signature off the NW limb at 03/1348 UTC. Initial modelling of the event shows a likely miss.
Very low solar activity is expected to continue on 04-06 Dec, with a slight chance for C-class flares.
Solar wind parameters were slightly enhanced over the period. Solar wind speed decreased from approximately 475 km/s to near 430 km/s. Total field increased from 4 nT to a peak of 9 nT at 03/1441 UTC while the Bz component was between +5/-7 nT. Phi angle was predominantly positive.
Solar wind conditions are expected to become elevated on 04-05 Dec with the arrival of two positive polarity CH HSSs. Solar wind speeds are expected to trend upwards of 500 km/s before slowly tapering down on 06 Dec.
The geomagnetic field was quiet to unsettled.
Quiet to active levels are forecast for 04-05 Dec due to CH HSS effects. Quiet to unsettled levels are expected on 06 Dec as HSS effects slowly wane.