Prohlížíte si archiv úterý 21. července 2015

Denní bulletin o sluneční a geomagnetické aktivitě ze SIDC

Vydáno: 2015 Jul 21 1230 UTC

SIDC Předpověď

Sluneční erupce

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

Geomagnetismus

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

Sluneční protony

Quiet

	10cm tok	Ap
21 Jul 2015	091	016
22 Jul 2015	090	012
23 Jul 2015	090	016

Bulletin

The two currently visible sunspot groups are magnetically simple and quiet. No C-class flares or earth-directed coronal mass ejections (CMEs) were observed. Some filaments in particular near the east and southwest limb are present.

Quiet flaring conditions are expected, with a small chance on an isolated C-class flare.

Starting around 23:00UT, solar wind speed gradually increased from a steady 300 km/s to values fluctuating between 370 and 430 km/s between 05:00 and 09:00UT. Current speed varies between 360 and 400 km/s. Bz has been oscillating mostly between -8 and +10 nT since about midnight. These are likely the limited effects of the moderate speed stream from the positive trans-equatorial coronal hole (CH). So far, only unsettled geomagnetic conditions have been recorded. The interplanetary magnetic field (IMF) remained mostly directed away from the Sun. A positive CH between latitude 25 to 40 degrees north is transiting the central meridian and may affect the geomagnetic field starting 25 July.

Mostly quiet to unsettled geomagnetic conditions are expected, but with a chance on an active geomagnetic episode from the CH's wind stream on 21-22 July and the possible glancing blow from the 19 July CME late on 22 or on 23 July.

Dnešní odhadovaný mezinárodní počet slunečních skvrn (ISN): 040, na základě 21 stanic.

Solární indexy za 20 Jul 2015

Wolfovo číslo Catania	045
10cm sluneční tok	093
AK Chambon La Forêt	013
AK Wingst	004
Odhadovaný Ap	004
Odhadovaný mezinárodní počet slunečních skvrn	043 - Na základě 24 stanic

Souhrn významných událostí

Poskytuje Centrum pro analýzu dat o solárních vlivech© - SIDC - Zpracováno SpaceWeatherLive

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