Viewing archive of Wednesday, 30 May 2018

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2018 May 30 1230 UTC

SIDC Forecast

Solar flares

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

Geomagnetism

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

Solar protons

Quiet

	10cm flux	Ap
30 May 2018	075	005
31 May 2018	075	010
01 Jun 2018	075	035

Bulletin

Beta region NOAA AR 2712 produced one B1.0 flare in the past 24 hours. The chance for a C flare in the next 24 hours is estimated at 25%.

No Earth-directed Coronal Mass Ejections (CMEs) were observed in available coronagraphic imagery.

The greater than 10 MeV proton flux was at nominal levels in the past 24 hours, and is expected to stay at nominal levels in the next 24 hours.

Solar wind speed near Earth as registered by DSCOVR varied between about 310 and 440 km/s in the past 24 hours. The Interplanetary Magnetic Field (IMF) was directed away from the Sun and its magnitude varied between about 0 and 6 nT. Bz was never below -5 nT. A high speed stream associated with a negative polarity equatorial coronal hole is expected to arrive near Earth late on May 31 or on June 1.

Quiet geomagnetic conditions (K Dourbes between 0 and 2; NOAA Kp = 1) were registered in the past 24 hours. Quiet to unsettled levels (K Dourbes < 4) are expected on May 30 and 31, with a chance for active to minor storm intervals (K Dourbes between 4 and 5) late on May 31 due to the expected arrival of the solar wind stream associated with the equatorial coronal hole. Active to minor storm levels are possible on June 1.

Today's estimated international sunspot number (ISN): 022, based on 25 stations.

Solar indices for 29 May 2018

Wolf number Catania	///
10cm solar flux	075
AK Chambon La Forêt	008
AK Wingst	006
Estimated Ap	004
Estimated international sunspot number	025 - Based on 28 stations

Noticeable events summary

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

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