查看星期日, 26 4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 Apr 26 1230 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

Quiet (A<20 and K<4)

太陽質子

Quiet

	10公分通量	Ap
26 Apr 2015	123	008
27 Apr 2015	121	015
28 Apr 2015	119	007

公告

Solar flaring activity was low with just two C flares occurring over the period. The largest was a long duration event from over the western limb, peaking at 18:49UT at C1.9 magnitude. It was associated with an eruption and CME, which appears to be not directed to Earth. Another C1.0 flare from Catania group 37 (NOAA region 2331) peaked just before the end of the period at 11:49UT. Flaring at C level is expected over the next days. An asymmetric full halo CME was also visible in SoHO/LASCO coronagraph data from 14:48UT onwards in the C2 field of view. No related on disc activity could be associated, and the event is believed to be backsided and hence not geoeffective. Solar wind was at nominal levels with speeds in the 290-330 km/s range and total magnetic field in the 2.1-4.6 nT range. Bz was variable though initially mostly positive. Phi angle was stable in the outward sector. Geomagnetic conditions were quiet to unsettled (NOAA Kp 0-1, local K Dourbes 0-3). Nominal solar wind conditions with associated quiet to unsettled geomagnetic conditions are expected to continue over the next days. Some possible sector boundary crossings could slightly enhance solar wind conditions.

今日估計的國際太陽黑子數（ISN）：042，基於11個觀測站。

太陽活動指數 25 Apr 2015

卡塔尼亞沃爾夫數	///
10厘米太陽通量	126
AK Chambon La Forêt	003
AK Wingst	002
估計地磁Ap指數	001
估計國際太陽黑子數	051 - 基於16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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