Перегляд архіву вівторок, 18 липня 2017

Щоденний бюлетень про сонячну та геомагнітну активність від SIDC

Випущено: 2017 Jul 18 1241 UTC

Прогноз SIDC

Сонячні спалахи

C-class flares expected, (probability >=50%)

Геомагнетизм

Quiet (A<20 and K<4)

Сонячні протони

Quiet

	10 см потік	Ap
18 Jul 2017	084	015
19 Jul 2017	083	017
20 Jul 2017	083	007

Бюлетень

NOAA region 2665 (Catania group 36) produced several C flares and is now located at the West limb. The largest was a C2.0 flare peaking at 00:40UT. As the region is disappearing behind the limb we still anticipate some related C flaring and a chance for an M flare but by the end of the period the region should have passed well around the limb. In SoHO/LASCO C2 a Westbound CME was visible from around 17:00UT onwards. It originated from NOAA region 2665 and was associated to along duration C1.2 flare. The CME had a limited angular extent and it is judged not to be Earth effective. Proton flux levels are at background values and expected to remain so.

Solar wind conditions showed the passage of the wake of the July 14 CME. Total magnetic field remained near 10nT for most of the period before dropping to nominal levels under 4nT around 9:00UT. Solar wind speed was mostly around 520 km/s before increasing to over 600 km/s around 9:00UT with values reaching over 650km/s. This thus seems to mark a transition into a fast solar wind regime around 9:00UT which is possibly due to the negative polarity coronal hole that passed the central meridian on July 14 in the southern hemisphere. Over the next 24-48 hours solar wind is expected to slowly recover towards nominal solar wind conditions. Geomagnetic conditions were mostly quiet to active (local K Dourbes 2-4) while the planetary NOAA Kp reached one isolated episode of moderate storm condition in the wake of the CME passage. With current high solar wind speed but nominal magnetic field values unsettled conditions are expected with isolated active periods possible. As Solar wind speed decreases quiet to unsettled conditions are expected later on.

Розрахунок міжнародної кількості сонячних плям станом на сьогодні (ISN): 000, за даними 24 станцій.

Сонячні індекси за 17 Jul 2017

Число Вольфа, Катанія	025
Сонячний потік 10 см	086
AK Chambon La Forêt	024
AK Wingst	024
Розрахунковий індекс Ap	026
Розрахункова міжнародна кількість сонячних плям	021 - За даними 33 станцій

Зведення помітних подій

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

Весь час у UTC

<< На сторінку денного огляду