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Щоденний бюлетень про сонячну та геомагнітну активність від SIDC

Випущено: 2023 Sep 19 1231 UTC

Прогноз SIDC

Сонячні спалахи

M-class flares expected (probability >=50%)

Геомагнетизм

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

Сонячні протони

Quiet

	10 см потік	Ap
19 Sep 2023	155	022
20 Sep 2023	157	007
21 Sep 2023	158	007

Сонячно-активні області та спалахи

There are nine active regions visible on the disk. There have been two M-class flares in the last 24 hours, from NOAA AR 3435. The strongest was an M1.9 flare occurring at 09:38 UTC (peak). This region and NOAA AR 3436 have increased in size and complexity and can produce more M-class flares in the next 24 hours.

Корональні викиди маси

A partial halo CME with angular width around 150 degrees was first seen at 11:12 UTC on 18 September by LASCO-C2. The CME most likely originated (the eruption signatures are weak) in the vicinity of NOAA AR 3436 in the NW quadrant, it was slow (around 300 km/s) and mostly directed to the NW. Nevertheless, a glancing blow at the Earth can not be discarded on 22 September.

Сонячний вітер

A shock was observed in DSCOVR data on 18 September at 12:57 UTC. The magnetic field jumped from 9 to 22 nT, and the solar wind speed from 420 to 550 km/s. This marks an early arrival of the 16 September CME. Later on, the solar wind speed surpassed the 600 km/s and the interplanetary magnetic field reached to 22 nT, with Bz down to -17 nT. We probably observed also some combined effects from a high speed solar wind stream. More disturbed solar wind conditions can be expected in the next 24 hours.

Геомагнетизм

During the last 24 hours the geomagnetic conditions have reached moderate storm levels globally (NOAA KP 6) and minor storm levels locally (K_Bel 5), due to the ICME arrival (from the CME on 16 September). The situation is expected to subside gradually, but more disturbed periods can be expected in the next 24 hours.

Рівні потоку протонів

Over the past 24 hours the greater than 10 MeV GOES proton flux was at nominal levels and is expected to remain so over the next 24 hours.

Потоки електронів на геостаціонарній орбіті

The greater than 2 MeV electron flux remained below the 1000 pfu threshold as measured by GOES 16. They may increase over the threshold in the next 24 hours. The 24 hour electron fluence was at normal levels and it could also increase in the next 24 hours.

Розрахунок міжнародної кількості сонячних плям станом на сьогодні (ISN): 158, за даними 13 станцій.

Сонячні індекси за 18 Sep 2023

Число Вольфа, Катанія	170
Сонячний потік 10 см	155
AK Chambon La Forêt	044
AK Wingst	031
Розрахунковий індекс Ap	030
Розрахункова міжнародна кількість сонячних плям	130 - За даними 24 станцій

Зведення помітних подій

Надано Центром Аналізу Даних Сонячного Впливу (SIDC)© - SIDC - Оброблено SpaceWeatherLive

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