查看星期日, 17 5月 2015歷史檔案

SIDC 太陽影響數據分析中心的每日公告

發布時間: 2015 May 17 1231 UTC

SIDC太陽影響數據分析中心的預報

太陽閃焰

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

地磁

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

太陽質子

Quiet

	10公分通量	Ap
17 May 2015	126	013
18 May 2015	122	021
19 May 2015	118	010

公告

No C-class flares were observed. NOAA 2339 is quietly rounding the west limb. The 5 other sunspot regions are small and magnetically simple. Various filament eruptions were observed, most notably a filament east of NOAA 2348 that erupted around 07:00UT. Based on currently available coronagraphic imagery, none of the related coronal mass ejections (CMEs) had an earth-directed component.

There's still a chance for an isolated C-class flare.

Solar wind speed decreased further from about 430 km/s and is currently ranging between 360 and 400 km/s. Bz varied between -4 and +5 nT. A sector boundary crossing was observed at 04:10-04:20UT, with the direction of the interplanetary magnetic field abruptly turning from toward to away from the Sun. Quiet to unsettled geomagnetic conditions were observed.

The arrival of the 13 May CME and the high speed stream from the recurrent positive polarity coronal hole are expected for later today or 18 May. This may result in active conditions, with a possibility on a minor storming episode.

今日估計的國際太陽黑子數（ISN）：059，基於17個觀測站。

太陽活動指數 16 May 2015

卡塔尼亞沃爾夫數	///
10厘米太陽通量	131
AK Chambon La Forêt	009
AK Wingst	006
估計地磁Ap指數	005
估計國際太陽黑子數	071 - 基於18個觀測站

顯著活動摘要

由太陽影響數據分析中心提供© - SIDC - 由 SpaceWeatherLive處理

所有時間均採用 UTC 時間

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