Перегляд архіву понеділок, 27 листопада 2017

Щоденний бюлетень про сонячну та геомагнітну активність від SIDC

Випущено: 2017 Nov 27 1230 UTC

Прогноз SIDC

Сонячні спалахи

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

Геомагнетизм

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

Сонячні протони

Quiet

	10 см потік	Ap
27 Nov 2017	075	011
28 Nov 2017	074	013
29 Nov 2017	074	008

Бюлетень

Solar activity was at very low levels. NOAA 2689 is the only visible sunspot group and was the source of a B2.9 event peaking at 11:17UT. Several filaments are present in the northern hemisphere, as well as a long filament in the SW quadrant. 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, with a small chance on a C-class flare.

The direction of the interplanetary magnetic field switched from away to towards the Sun around noon on 26 November. It was accompanied by a gradual increase in solar wind density, likely from the stream interaction region preceding the expected high speed stream (HSS) from the negative equatorial coronal hole (CH). Solar wind speed was around 300 km/s until 19:00UT, when it started a gradual increase to its current values between mostly 400 and 430 km/s (DSCOVR). Bz varied between -6 and +10 nT.

The geomagnetic field was at quiet levels throughout the period. Increasing wind speeds are expected in response to the full arrival of the HSS later today, which may result in unsettled to active geomagnetic conditions. A glancing blow from the 25 November CME is possible and may result in unsettled conditions late on 28 or on 29 November.

Розрахунок міжнародної кількості сонячних плям станом на сьогодні (ISN): 016, за даними 09 станцій.

Сонячні індекси за 26 Nov 2017

Число Вольфа, Катанія	///
Сонячний потік 10 см	076
AK Chambon La Forêt	006
AK Wingst	002
Розрахунковий індекс Ap	002
Розрахункова міжнародна кількість сонячних плям	019 - За даними 25 станцій

Зведення помітних подій

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

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