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Daily bulletin on solar and geomagnetic activity from the SIDC

Vydáno: 2019 Aug 06 1231 UTC

SIDC Forecast

Sluneční erupce

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

Geomagnetism

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

Sluneční protony

Quiet

	10cm flux	Ap
06 Aug 2019	067	014
07 Aug 2019	067	016
08 Aug 2019	067	005

Bulletin

Solar activity was at very low levels. The small sunspot region which appeared yesterday (5 August) had decayed by midnight leaving the Sun spotless again. No earth-directed coronal mass ejections (CME) were observed. The greater than 10 MeV proton flux was at nominal values.

Solar activity is expected to remain at very low levels.

The earth environment remained under the influence of the high-speed stream (HSS) of the positive polarity coronal hole. Solar wind speed further increased and varied mostly between 690 and 760 km/s from 20UT till 06UT (ACE). By the end of the period, values had decreased somewhat to near 640 km/s. Bz oscillations became less pronounced, from initial values between -8 and +8 nT to between -4 and + 4 nT after 20UT. The interplanetary magnetic field (phi angle) was mostly directed away from the Sun.

Geomagnetic conditions ranged from quiet to minor storming. Quiet to active geomagnetic conditions are expected, with a small chance on an isolated minor storming period.

Today's estimated international sunspot number (ISN): 000, based on 21 stations.

Solar indices for 05 Aug 2019

Wolf number Catania	///
10cm solar flux	068
AK Chambon La Forêt	045
AK Wingst	035
Estimated Ap	037
Estimated international sunspot number	013 - Based on 22 stations

Noticeable events summary

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

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