Prohlížíte si archiv čtvrtek 21. července 2016

Denní bulletin o sluneční a geomagnetické aktivitě ze SIDC

Vydáno: 2016 Jul 21 1230 UTC

SIDC Předpověď

Sluneční erupce

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

Geomagnetismus

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

Sluneční protony

Quiet

	10cm tok	Ap
21 Jul 2016	109	012
22 Jul 2016	108	018
23 Jul 2016	107	021

Bulletin

During the first half of the period, the magnetic configuration around NOAA 2567's main spot became more complex with a weak delta to the north and a filament south of the main spot. Flaring activity intensified with an impulsive M1.2 (peak at 00:46UT) and an M1.0 (peak at 01:49UT) being the strongest events. There were also 7 C-class flares, originating all from this region or near the inversion line with NOAA 2565. NOAA 2565 and NOAA 2569 were quiet.

There is a reasonable chance on another M-class flaring episode, in particular from NOAA 2567.

Starting around 22:30UT (20 July), CACTus reported coronal mass ejections (CMEs) directed to the northeast (22:24UT) and southwest (22:36UT), and each about 50 degrees wide. With no obvious activity on the Sun's farside or eastern hemisphere, it is very likely that these CMEs were related to a C4.6 flare that peaked at 22:17UT in NOAA 2567. Sagamore Hill reported a Type II radio burst with associated shock speed of 1168 km/s. Assuming these CMEs have an earth-directed component, the geomagnetic field may be impacted late on 22 or on 23 July. These results are preliminary and may be further finetuned.

Solar wind speed decreased from 600 to 430 km/s. Bz was mostly positive, varying between +2 and +12 nT, and ending the period at a steady +7 nT. The interplanetary magnetic field was directed towards the Sun (negative). Quiet to unsettled geomagnetic conditions were observed.

Mostly quiet to unsettled geomagnetic conditions are expected. Active to minor storming episodes are possible in response to the high speed stream of the negative northern coronal hole later today or tomorrow, and from the possible impact of the 20 July CME late on 22 or on 23 July.

Dnešní odhadovaný mezinárodní počet slunečních skvrn (ISN): 055, na základě 24 stanic.

Solární indexy za 20 Jul 2016

Wolfovo číslo Catania	065
10cm sluneční tok	108
AK Chambon La Forêt	014
AK Wingst	023
Odhadovaný Ap	025
Odhadovaný mezinárodní počet slunečních skvrn	059 - Na základě 33 stanic

Souhrn významných událostí

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