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 16.9.2021 kello 15:30

Auringon aktiivisuus

  • Edellinen vuorokausi

    Solar activity was very low and the visible disk was spotless. No new Earth-directed CMEs were observed in available coronagraph imagery.

  • Lähipäivien ennuste

    Solar activity is expected to be very low 16-18 Sep.

Aurinkotuuli

  • Edellinen vuorokausi

    Solar wind parameters were indicative of a slow regime. Total IMF strength averaged near 4 nT and the Bz component underwent only weak deviations. Solar wind speed decreased from near 400 km/s to ~315 km/s and the phi angle was predominantly positive, but did undergo some deviations into a negative sector.

  • Lähipäivien ennuste

    Mostly background conditions are expected the remainder of 16 Sep. On 17 Sep, moderate enhancements in the solar wind parameters are possible with an anticipated glancing blow from the 13 Sep CME, combined with the likely onset of a negative polarity CH HSS. Enhanced conditions should persist into 18 Sep as CME/CH HSS effects persist.

Geomagneettinen kenttä

  • Edellinen vuorokausi

    The geomagnetic field was quiet.

  • Lähipäivien ennuste

    Mostly quiet conditions are expected the remainder of 16 Sep. By 17 Sep, the combined effects from a negative polarity CH HSS and the possible arrival of the 13 Sep CME could result in unsettled to active conditions, with a chance for isolated G1 (minor) levels.

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