Viewing archive of Thursday, 12 October 2017

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2017 Oct 12 1237 UTC

SIDC Forecast

Solar flares

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

Geomagnetism

Moderate (ISES: Major) magstorm expected (A>=50 or K=6)

Solar protons

Quiet

	10cm flux	Ap
12 Oct 2017	070	034
13 Oct 2017	069	030
14 Oct 2017	070	024

Bulletin

Solar activity was at very low levels. There is no sunspots on the visible side of solar disk. Narrow and slow coronal mass ejections (CMEs) observed in coronagraphic imagery are not geoeffective. Integral proton flux for protons with energies above 10 MeV decreased from around 0.8 pfu till nominal 0.3 pfu over the past 24 hours. Quiet flaring conditions are expected to continue. The earth environment is currently under the influence of a positive polar coronal hole. Solar wind speed increased from 430 to 580 km/s (DSCOVR) over the past 24 hours and is expected to grow more. Total interplanetary magnetic filed is below 11 nT, while Bz component was varying between -10 and 9 nT over the past 24 hours, being mainly negative. The geomagnetic field is ranged from active to minor storm levels during the past 24 hours (Planetary NOAA Kp: 4-5; local K index at Dourbes: 2-5). Active to moderate geomagnetic conditions are expected to continue for next three days.

Today's estimated international sunspot number (ISN): 000, based on 24 stations.

Solar indices for 11 Oct 2017

Wolf number Catania	000
10cm solar flux	070
AK Chambon La Forêt	048
AK Wingst	031
Estimated Ap	034
Estimated international sunspot number	000 - Based on 23 stations

Noticeable events summary

Provided by the Solar Influences Data analysis Center© - SIDC - Processed by SpaceWeatherLive

All times in UTC

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