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Tägliches Bulletin zur solaren und geomagnetischen Aktivität des SIDC

Ausgestellt: 2017 Jul 12 1259 UTC

Vorhersage des SIDC

Sonneneruptionen

M-class flares expected (probability >=50%)

Geomagnetismus

Active conditions expected (A>=20 or K=4)

Sonnenprotonen

Quiet

	10cm Fluss	Ap
12 Jul 2017	091	003
13 Jul 2017	090	004
14 Jul 2017	091	012

Bulletin

Solar activity was low with NOAA AR region 2665 (Catania group 36) producing B and C class flares. The strongest C1.2 flare was peaking at 20:31UT yesterday. The group evolved into a Beta-Gamma configuration, however it's magnetic complexity decreased during the period. Few slow and narrow (not Earth directed CMEs) were detected by Cactus during the past 24 hours. A small negative polarity southern coronal hole may create enhanced solar wind conditions on the day 3 (14-Jul-2017). Solar proton flux values are at background levels and expected to remain so. More C-class flares can be expected (and less likely M-flares). Solar wind parameters reflected a fainting influence of a high speed stream from an equatorial coronal hole. Total magnetic field remained below 5 nT, while Bz component was fluctuating between +/-3 nT over the past 24 hours. Solar wind speed gradually decreased from 620 km/s till 510 km/s. Geomagnetic conditions were very quiet. Planetary index Kp decreased from 2 to 1, while the local K index (Dourbes) was fluctuating between 1 and 3 over the past 24 hours. The geomagnetic field is expected to be at quiet levels today and tomorrow, while on the day 3 (14-Jul-2017) active geomagnetic conditions can be expected due to the influence of a small negative polarity southern coronal hole.

Die heute international geschätzte Sonnenfleckenanzahl (ISN): 062, basierend auf 21 Stationen.

Solarindizes für den 11 Jul 2017

Wolf-Zahl Catania	041
10cm Solarflux	091
AK Chambon La Forêt	014
AK Wingst	010
Geschätzer Ap-Wert	011
Geschätzte internationale Sonnenfleckenzahl	039 - Basierend auf 29 Stationen

Zusammenfassung auffälliger Ereignisse

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

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