Vaata reede, 1 detsember 2017 arhiivi

Daily bulletin on solar and geomagnetic activity from the SIDC

Välja antud: 2017 Dec 01 1230 UTC

SIDC Forecast

Valid from 1230 UTC, 01 Dec 2017 until 03 Dec 2017
Päikesepursked ehk loited

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

Geomagnetism

Quiet (A<20 and K<4)

Päikese prootonid

Quiet

10cm fluxAp
01 Dec 2017071005
02 Dec 2017070005
03 Dec 2017069005

Bulletin

Solar activity was at very low levels. Sunspot region NOAA 2689 has become nearly spotless and will rotate over the NW limb later today. It produced a small B1 flare around 14UT (PROBA2/LYRA), and its group filament erupted between 01:30UT and 03:00UT. The 40 degrees long filament rounded the SW limb quietly. No earth-directed coronal mass ejections (CMEs) were observed in available coronagraphic imagery. The greater than 10 MeV proton flux was at nominal levels.

Quiet flaring conditions are expected.

Earth remained under the influence of the wind stream from the southern polar coronal hole (CH) extension. Solar wind speed peaked briefly near 540 km/s around 02UT, and ended the period with values near 470 km/s. Bz oscillated mostly between +5 nT and -6 nT. The interplanetary magnetic field was mostly directed towards the Sun. The extension of a positive northern polar CH has started transiting the central meridian.

The geomagnetic field was quiet to unsettled throughout the period, and is expected to remain so. The high speed stream from the northern polar coronal hole (CH) extension is expected to affect the earth environment starting most likely 04 December. This may result in minor to moderate geomagnetic storming.

Today's estimated international sunspot number (ISN): 000, based on 08 stations.

Solar indices for 30 Nov 2017

Wolf number Catania///
10cm solar flux072
AK Chambon La Forêt015
AK Wingst012
Estimated Ap012
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

Kõik ajad UTC-s

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