Vaata reede, 1 juuni 2018 arhiivi

Daily bulletin on solar and geomagnetic activity from the SIDC

Välja antud: 2018 Jun 01 1230 UTC

SIDC Forecast

Valid from 1230 UTC, 01 Jun 2018 until 03 Jun 2018
Päikesepursked ehk loited

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

Geomagnetism

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

Päikese prootonid

Quiet

10cm fluxAp
01 Jun 2018077029
02 Jun 2018078024
03 Jun 2018078017

Bulletin

The Sun produced several B flares in the past 24 hours. NOAA AR 2712 has evolved to beta-gamma, and an active region is appearing near the East limb. The chance for a C flare in the next 24 hours is estimated at 60%, mainly from both regions mentioned above.

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.

Around 14:15 UT on May 31, the Interplanetary Magnetic Field (IMF) as observed by DSCOVR changed from a positive (away from the Sun) to a negative (towards the Sun) sector, while its magnitude increased from about 4 nT to a maximum value of around 17 nT. Current IMF magnitude values are near 8 nT. Bz fluctuated between positive and negative values, with a minimum value of about -12 nT. Since about 16:00 UT, solar wind speed started rising gradually from about 375 km/s to current values near 620 km/s. This marks the expected arrival of the Corotating Interaction Region (CIR) and high speed stream associated with a negative polarity equatorial coronal hole.

Quiet to active geomagnetic conditions (K Dourbes between 2 and 4; NOAA Kp between 2 and 4) were registered in the past 24 hours. Active to minor storm levels are possible on June 1, 2 and 3 due to the effects of the high speed stream associated with the equatorial coronal hole, with a chance for moderate storm intervals (K Dourbes = 6).

Today's estimated international sunspot number (ISN): 025, based on 23 stations.

Solar indices for 31 May 2018

Wolf number Catania024
10cm solar flux077
AK Chambon La Forêt024
AK Wingst016
Estimated Ap015
Estimated international sunspot number/// - Based on /// stations

Noticeable events summary

DayBeginMaxLõppLocStrengthOP10cmCatania/NOAARadio burst types
Puuduvad

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

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