Vaata neljapäev, 20 jaanuar 2022 arhiivi

Daily bulletin on solar and geomagnetic activity from the SIDC

Välja antud: 2022 Jan 20 1231 UTC

SIDC Forecast

Valid from 1230 UTC, 20 Jan 2022 until 22 Jan 2022
Päikesepursked ehk loited

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

Geomagnetism

Quiet (A<20 and K<4)

Päikese prootonid

Proton event in progress (>10 MeV)

10cm fluxAp
20 Jan 2022105007
21 Jan 2022102011
22 Jan 2022098007

Bulletin

There are 4 visible active regions on the solar disk. NOAA AR 2929 produced an M5.5 flare peaking at 06:01 UT (and several C-class flares). This region is about to rotate over the west limb, but it can still produce C and M-class flares (and proton events at Earth).

The flare described above was related to a CME with an angular width of about 100 degrees, directed to the northwest with speeds around 1000 km/s. Since the source region was close to the limb, an Earth directed component is not likely (but a shock arrival cannot be discarded on 22-23 January).

As a consequence of the CME and M5.5 flare, the greater than 10 MeV proton flux exceeded the 10 pfu threshold, it is now close to 20 pfu. The greater than 2 MeV electron flux has been slightly above the 1000 pfu alert threshold and is expected to remain close to the threshold during the next 24 hours. The 24h electron fluence was at moderate levels and is expected to remain so in the next 24 hours.

The solar wind speed at Earth decreased to about 470 km/s, and the interplanetary magnetic field around 5 nT. Slow solar wind conditions are expected for the next 24 hours.

Geomagnetic conditions were quiet to unsettled both at local and planetary levels (K_Bel 1 - 3, Kp 1 - 3). Similar conditions are expected for the next 24 hours, with possible active conditions if the CME from 18 January arrives to the Earth (expected late on 21 January).

Today's estimated international sunspot number (ISN): 057, based on 19 stations.

Solar indices for 19 Jan 2022

Wolf number Catania058
10cm solar flux105
AK Chambon La Forêt019
AK Wingst023
Estimated Ap024
Estimated international sunspot number058 - Based on 18 stations

Noticeable events summary

DayBeginMaxLõppLocStrengthOP10cmCatania/NOAARadio burst types
20054106010612N08W68M5.51F35006/2929V/3II/2

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

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