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Щоденний бюлетень про сонячну та геомагнітну активність від SIDC

Випущено: 2024 Feb 21 1231 UTC

Прогноз SIDC

Сонячні спалахи

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

Геомагнетизм

Quiet (A<20 and K<4)

Сонячні протони

Quiet

	10 см потік	Ap
21 Feb 2024	150	008
22 Feb 2024	148	010
23 Feb 2024	146	010

Сонячно-активні області та спалахи

Solar flaring activity over the past 24 hours was at low levels. The largest flare was a C4.4-flare, with peak time 02:17 UTC on February 21, associated with a yet unnumbered active region behind the east-limb on the southern hemisphere of the Sun. There are currently 3 numbered active regions on the visible disk. NOAA AR 3590 (beta-gamma) is the largest and most magnetically complex region but has only produced minor C-class flares in the last 24 hours. NOAA AR 3586 (beta) has been stable and inactive. NOAA AR 3584 has decreased in size and is rotating over the west limb. The solar flaring activity is likely to be at low levels over the coming days with C-class flares expected and M-class flares possible.

Корональні викиди маси

No Earth directed Coronal Mass Ejections (CME)s, have been observed in the last 24 hours. Further analysis of the CME seen in LASCO C2 data one at 23:24 UTC on February 19, shows it is not expected to impact the Earth.

Сонячний вітер

Slow solar wind conditions were recorded over the past 24 hours. The solar wind speed as measured by ACE, gently declined from around 460 km/s to around 270 km/s. The interplanetary magnetic field fluctuated between 2 nT and 9 nT, with the Bz reaching a minimum value of -6 nT. The phi-angle was in the positive sector (directed away the Sun) with periods on the negative sector. In the next 24-hours slow solar wind conditions are expected.

Геомагнетизм

Geomagnetic conditions were globally and locally quiet (Kp 3 and K Bel 3) with some unsettled periods over the past 24 hours.

Рівні потоку протонів

Over the past 24 hours the greater than 10 MeV GOES proton flux continued to decrease and, although still slightly elevated, remained below the 10 pfu threshold. The proton flux is expected to continue to decrease over the next 24 hours.

Потоки електронів на геостаціонарній орбіті

The greater than 2 MeV GOES 16 electron flux was below the 1000 pfu threshold and is expected to remain so in the upcoming days. The 24h electron fluence was at nominal level and is expected to remain so in the next days.

Розрахунок міжнародної кількості сонячних плям станом на сьогодні (ISN): 050, за даними 11 станцій.

Сонячні індекси за 20 Feb 2024

Число Вольфа, Катанія	///
Сонячний потік 10 см	153
AK Chambon La Forêt	012
AK Wingst	007
Розрахунковий індекс Ap	006
Розрахункова міжнародна кількість сонячних плям	049 - За даними 24 станцій

Зведення помітних подій

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

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