Перегляд архіву понеділок, 18 грудня 2017

Щоденний бюлетень про сонячну та геомагнітну активність від SIDC

Випущено: 2017 Dec 18 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
18 Dec 2017	070	026
19 Dec 2017	070	022
20 Dec 2017	070	019

Бюлетень

The Sun is spotless and no significant flaring activity was recorded. No flaring activity is expected over the next 24 hours. There were no CMEs observed in coronagraph data. The proton flux values are at background levels and are expected to remain so. An elongated negative polarity equatorial coronal hole started transiting the central meridian. It may influence solar wind from November 20 onwards.

Solar wind is under the expected influence of a positive polarity coronal hole high speed stream. Since just after the start of the reporting period solar wind speed has been between 575 and 650 km/s. Total magnetic field was between 5-10nT with negative peaks of Bz down to -7nT. Based on Stereo A Solar wind measurements, the influence of the high speed stream is expected to decay over the next 24 hours. On December 20 we may see some minor influence of the December 15 CME and later on a renewed increase in Solar wind conditions due to the negative polarity equatorial coronal hole currently transiting the central meridian.

Geomagnetic conditions have seen a minor storm period in the afternoon of December 17 with both NOAA Kp and local K Dourbes reaching K=5. Afterwards, quiet to active conditions were reported (NOAA Kp 3-4 and local K Dourbes 2-4). With Solar wind speed still high, periods of active geomagnetic conditions should be anticipated but should become less likely over the next 24-48 hours. Renewed increases of geomagnetic activity may follow starting December 20 caused by the possible December 15 CME influence and later increased Solar wind conditions due to the negative polarity equatorial coronal hole currently transiting the central meridian.

Розрахунок міжнародної кількості сонячних плям станом на сьогодні (ISN): 000, за даними 14 станцій.

Сонячні індекси за 17 Dec 2017

Число Вольфа, Катанія	///
Сонячний потік 10 см	071
AK Chambon La Forêt	044
AK Wingst	026
Розрахунковий індекс Ap	028
Розрахункова міжнародна кількість сонячних плям	000 - За даними 19 станцій

Зведення помітних подій

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

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