Prohlížíte si archiv středa 27. září 2017

Denní bulletin o sluneční a geomagnetické aktivitě ze SIDC

Vydáno: 2017 Sep 27 1248 UTC

SIDC Předpověď

Sluneční erupce

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

Geomagnetismus

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

Sluneční protony

Quiet

	10cm tok	Ap
27 Sep 2017	091	029
28 Sep 2017	093	013
29 Sep 2017	091	008

Bulletin

Over the past 24 hours solar activity has been low. No significant flares have been recorded. Catania group 57 (NOAA AR region 2683) has been most active, producing one C1.7 flare peaking at 01:03 UT today. Eruptive activity observed on the visible side of the solar disk yesterday is not geoeffective. No Earth directed Coronal Mass Ejections (CMEs) have been detected today. The greater than 10MeV proton flux remained at background levels over the past 24 hours. Solar activity is expected to remain low over the next 24 hours with some probability of C-class flares. The sudden jump of the solar wind speed (up to maximum value of 560 km/s) and simultaneous increase of the density and interplanetary magnetic field magnitude (up to 17 nT) observed at around 07 UT on September 27 (today) indicated arrival of the fast flow associated with the low latitude extension of the northern polar coronal hole. The longer intervals of the southward Bz component (up to -17 nT) and fast solar wind induced minor geomagnetic storm conditions starting at about 06:00 UT on September 27 (local station at Dourbes reported K=4 and NOAA reported Kp=5). We expect active to minor storm conditions (till Kp=5) within next 24 hours due to arrival of the fast solar wind. Isolated episodes of Kp=6 are also not excluded.

Dnešní odhadovaný mezinárodní počet slunečních skvrn (ISN): 040, na základě 17 stanic.

Solární indexy za 26 Sep 2017

Wolfovo číslo Catania	046
10cm sluneční tok	091
AK Chambon La Forêt	013
AK Wingst	005
Odhadovaný Ap	003
Odhadovaný mezinárodní počet slunečních skvrn	041 - Na základě 24 stanic

Souhrn významných událostí

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