Viewing archive of Monday, 31 October 2016

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2016 Oct 31 1349 UTC

SIDC Forecast

Solar flares

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

Geomagnetism

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

Solar protons

Quiet

	10cm flux	Ap
31 Oct 2016	076	013
01 Nov 2016	077	008
02 Nov 2016	076	008

Bulletin

Solar activity is low. No flares were observed. There is one NOAA active region (AR 2604) on the visible side of the solar disc with the simple magnetic configuration (beta). Catania decaying (51) sunspot group is also observed on the visible side of solar disc. Cactus detected a slow- moving narrow CME yesterday 30-Oct-2016 at 23:36 UT at the western limb of the solar disk, with no geoeffective effects expected. One big, but stable filament is approaching solar disk centre. Solar proton flux intensity is expected to lie within the background levels. Solar activity is expected to be low with small probability for C-class flares.

Earth remained under the decaying influence of the high speed stream from the coronal hole. Solar wind speed decreased from around 600 km/s to 490 km/s (DSCOVR). The interplanetary magnetic field (Bt) decreased from about 10 nT to +4nT. Bz oscillated mostly between -4 and +4 nT. The local K index at Dourbes was ranged between 2 and 4(planetary Kp index was also ranged between 2 and 4) during last 24 hours. The geo-environment is expected to remain under the gradually weakening influence of the CH HSS. Quiet conditions are expected.

Today's estimated international sunspot number (ISN): 014, based on 28 stations.

Solar indices for 30 Oct 2016

Wolf number Catania	///
10cm solar flux	076
AK Chambon La Forêt	026
AK Wingst	020
Estimated Ap	022
Estimated international sunspot number	014 - Based on 30 stations

Noticeable events summary

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

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