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.

Julkaistu 4.12.2021 kello 02:30

Auringon aktiivisuus

  • Edellinen vuorokausi

    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.

  • Lähipäivien ennuste

    Very low solar activity is expected to continue on 04-06 Dec, with a slight chance for C-class flares.

Aurinkotuuli

  • Edellinen vuorokausi

    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.

  • Lähipäivien ennuste

    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.

Geomagneettinen kenttä

  • Edellinen vuorokausi

    The geomagnetic field was quiet to unsettled.

  • Lähipäivien ennuste

    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.

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