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Daily bulletin on solar and geomagnetic activity from the SIDC

Emesso: 2016 Oct 30 1230 UTC

SIDC Forecast

Brillamenti solari

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

Geomagnetism

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

Protoni solari

Quiet

	10cm flux	Ap
30 Oct 2016	079	016
31 Oct 2016	081	013
01 Nov 2016	083	008

Bulletin

A B2 flare peaking at 23:05UT was most likely associated with an eruptive event from NOAA 2603 from behind the northwest solar limb. The related CME was not earth-directed. NOAA 2604 (Catania 50) is decaying, while old active region NOAA 2599 is rounding the southeast limb, currently as a spotless faculae area. No earth-directed coronal mass ejections (CMEs) were observed.

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

Earth remained under the influence of the high speed stream (HSS) from the huge coronal hole (CH). Solar wind speed ranged from 550 to 670 km/s (DSCOVR), and is currently hovering around 550 km/s (ACE). Bz oscillated mostly between -6 and +6 nT. The interplanetary magnetic field (IMF) was directed away from the Sun (positive). Kp ranged from unsettled to active conditions, while K Dourbes ranged from quiet to unsettled conditions.

The geo-environment is expected to remain under the gradually weakening influence of the CH HSS. Quiet to active conditions are expected.

Today's estimated international sunspot number (ISN): 013, based on 19 stations.

Solar indices for 29 Oct 2016

Wolf number Catania	///
10cm solar flux	079
AK Chambon La Forêt	031
AK Wingst	022
Estimated Ap	026
Estimated international sunspot number	024 - Based on 31 stations

Noticeable events summary

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

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