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Tägliches Bulletin zur solaren und geomagnetischen Aktivität des SIDC

Ausgestellt: 2017 Oct 25 1230 UTC

Vorhersage des SIDC

Sonneneruptionen

Quiet conditions (<50% probability of C-class flares)

Geomagnetismus

Minor storm expected (A>=30 or K=5)

Sonnenprotonen

Quiet

	10cm Fluss	Ap
25 Oct 2017	079	041
26 Oct 2017	079	040
27 Oct 2017	079	021

Bulletin

Quiet solar conditions were reported with the X-ray flux touching only marginally into the B level. Both active regions on disk are relatively simple (Mag.Type: Alpha) and quiet. The X-ray flux is expected to remain below C level. Proton flux levels were at background values and are expected to remain so. No Earth directed CME's were recorded in coronagraph data.

Solar wind speed increased further as expected under the influence of the coronal hole high speed stream. Speeds increased to values between 600-650kms after 20UT and remained at those values since. Total magnetic field was mostly in the 7-11nT range but presently steady at around 5.5 nT. Bz was variable but saw some periods of negative values down to -9nT. The phi angle was predominantly in the positive sector. Total magnetic field is expected to remain around nominal values while solar wind speed is expected to remain elevated over the next 24-48 hours. Geomagnetic conditions reached some periods of minor geomagnetic storming (Both NOAA Kp and local K Dourbes 5 for the 15-18UT period, while only NOAA Kp reaching 5 in the 6-9UT period). As solar wind speed remains elevated further minor geomagnetic storming episodes should be anticipated.

Die heute international geschätzte Sonnenfleckenanzahl (ISN): 023, basierend auf 16 Stationen.

Solarindizes für den 24 Oct 2017

Wolf-Zahl Catania	///
10cm Solarflux	078
AK Chambon La Forêt	044
AK Wingst	028
Geschätzer Ap-Wert	026
Geschätzte internationale Sonnenfleckenzahl	024 - Basierend auf 15 Stationen

Zusammenfassung auffälliger Ereignisse

Zur Verfügung gestellt vom Solar Influences Data Analysis Center© - SIDC - Verarbeitet von SpaceWeatherLive

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