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Daily bulletin on solar and geomagnetic activity from the SIDC

Emesso: 2017 Aug 30 1237 UTC

SIDC Forecast

Brillamenti solari

C-class flares expected, (probability >=50%)

Geomagnetism

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

Protoni solari

No forecast

	10cm flux	Ap
30 Aug 2017	084	005
31 Aug 2017	083	040
01 Sep 2017	083	012

Bulletin

Over the past 24 hours solar activity has been low. There are currently tree active regions on the visible discs, but only Catania group 47 (NOAA region 2674) produced small C-class flare. We expect the activity to remain low with a probability of few sporadic C-class flare.

No other Earth directed Coronal Mass Ejections (CMEs) have been detected in the available coronagraph imagery and the solar protons remains at background level.

A minor geomagnetic storm was observed on August, 29 with a peaking around 21:00 UT. This may be due to an Interplanetary CME that provoked a shock onto the Solar Wind on August, 29 around 16:00 UT. Currently, the geomagnetic conditions are returning to quiet with Kp (NOAA) and local K (Dourbes) indexes ranging between 1-2. A minor to moderated storm (K between 5 and 6) is expected on August, 31 when the fast solar wind coming from the large coronal hole crossing the central meridian on August 29 will reach Earth.

Today's estimated international sunspot number (ISN): 048, based on 19 stations.

Solar indices for 29 Aug 2017

Wolf number Catania	051
10cm solar flux	084
AK Chambon La Forêt	019
AK Wingst	010
Estimated Ap	011
Estimated international sunspot number	036 - Based on 35 stations

Noticeable events summary

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

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