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Daily bulletin on solar and geomagnetic activity from the SIDC

Emesso: 2017 Aug 16 1230 UTC

SIDC Forecast

Brillamenti solari

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

Geomagnetism

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

Protoni solari

Quiet

	10cm flux	Ap
16 Aug 2017	074	010
17 Aug 2017	077	022
18 Aug 2017	080	007

Bulletin

NOAA AR 2671 produced only 1 C-class flare in past 24 h (C1.1 peak at 13:52 UT on August 15), associated with a CME directed to the west that is not expected to affect the Earth. This region has a beta magnetic field configuration and it is still evolving, more C-class flares can be expected (and less likely M-class flares).

No Earth directed Coronal Mass Ejections (CMEs) have been detected. Solar protons have remained at background levels over the past 24 hours.

Geomagnetic conditions have been quiet (K and Kp 1 to 2). Solar wind speed is at 370 km/s with interplanetary magnetic field intensity of 5 nT. The fast solar wind from a coronal hole is expected to arrive within 24 h, producing K values up to 5 (with possible isolated periods of K values up to 6).

Today's estimated international sunspot number (ISN): 029, based on 20 stations.

Solar indices for 15 Aug 2017

Wolf number Catania	///
10cm solar flux	074
AK Chambon La Forêt	009
AK Wingst	004
Estimated Ap	003
Estimated international sunspot number	021 - Based on 28 stations

Noticeable events summary

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

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