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Tägliches Bulletin zur solaren und geomagnetischen Aktivität des SIDC

Ausgestellt: 2014 Jul 24 1228 UTC

Vorhersage des SIDC

Sonneneruptionen

Eruptive (C-class flares expected, probability >=50%)

Geomagnetismus

Quiet (A<20 and K<4)

Sonnenprotonen

Quiet

	10cm Fluss	Ap
24 Jul 2014	109	006
25 Jul 2014	115	007
26 Jul 2014	120	007

Bulletin

Solar activity has been mainly quiet with the background X-ray flux remaining between the B2 and B3 level. Catania sunspot group 22 (NOAA AR 2121) however did produce a C2.1 flare peaking at 1:51 UT. A chance for a further occasional C-flare from AR 2121 remains and also the probability for C-flares from Catania group 24 (NOAA AR 2123) has increased. With a reasonable full disc chance for C flares the all quiet alert status is therefore lifted, though at most an occasional low C level flare is likely. No significant Earth directed CME's were observed. A transequatorial coronal hole crossed the central meridian around UT midnight July 23 to 24. It is likely to influence the solar wind conditions near Earth starting late July 26, early July 27. Solar wind speed was first stable in the beginning of the reporting period around 320 km/s and later picked up to enhanced values of around 380 km/s presently. The total magnetic field also increased from being stable between 3-4nT just before the reporting period to fluctuating between 2nT and 7nT during the past 24 hours with Bz variable between +-5nT. Geomagnetic conditions were mostly quiet (NOAA Kp = 1-2 and local K Dourbes = 0-2) with a 6 hour period of unsettled conditions before UT midnight (both NOAA Kp and local K Dourbes = 3). Slightly enhanced solar wind conditions and quiet to unsettled geomagnetic conditions are expected to continue under the influence of a coronal hole stream.

Die heute international geschätzte Sonnenfleckenanzahl (ISN): 048, basierend auf 17 Stationen.

Solarindizes für den 23 Jul 2014

Wolf-Zahl Catania	079
10cm Solarflux	099
AK Chambon La Forêt	012
AK Wingst	006
Geschätzer Ap-Wert	006
Geschätzte internationale Sonnenfleckenzahl	048 - Basierend auf 27 Stationen

Zusammenfassung auffälliger Ereignisse

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

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