Перегляд архіву середа, 20 грудня 2017

Щоденний бюлетень про сонячну та геомагнітну активність від SIDC

Випущено: 2017 Dec 20 1230 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
20 Dec 2017	070	008
21 Dec 2017	071	016
22 Dec 2017	071	007

Бюлетень

Solar activity was very low with only a couple of low level B class flares from the only region on disk Catania sunspotgroup 67. The region is still fairly simple but has shown quite some growth this morning. Flaring is expected to remain below C level. A filament eruption is seen off the North Eastern hemisphere around 3:00UT. Coronagraph data are not yet available to assess the extent of the likely associated CME. Proton flux values are at background levels and expected to remain so.

Solar wind has recovered to background conditions with Solar wind speed dropping to 450 km/s by around 2:00 UT this morning and remained stable since. Total magnetic field has been fluctuating around 3-4nT with a variable Bz. A possible arrival of the December 15 CME is no longer expected. A transition into a negative sector is expected within the next 24 hours with then also the influence of the negative polarity equatorial coronal hole possibly setting in. However, the leading part of the coronal hole which passed the central meridian on December 18 is not likely to bring any strong effects. A more significant high speed stream influence is only expected 3-4 days from now from the trailing part of the coronal hole which only now starts passing the central meridian. Geomagnetic conditions were quiet to unsettled (both local K Dourbes and NOAA Kp 1-3). Quiet to unsettled conditions are expected over the next days.

Розрахунок міжнародної кількості сонячних плям станом на сьогодні (ISN): 011, за даними 06 станцій.

Сонячні індекси за 19 Dec 2017

Число Вольфа, Катанія	011
Сонячний потік 10 см	069
AK Chambon La Forêt	012
AK Wingst	006
Розрахунковий індекс Ap	005
Розрахункова міжнародна кількість сонячних плям	007 - За даними 19 станцій

Зведення помітних подій

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

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