發布時間: 2014 Sep 04 1249 UTC
Active (M-class flares expected, probability >=50%)
Quiet (A<20 and K<4)
Warning condition (activity levels expected to increase, but no numeric forecast given)
| 10公分通量 | Ap | |
|---|---|---|
| 04 Sep 2014 | 141 | 011 |
| 05 Sep 2014 | 145 | 007 |
| 06 Sep 2014 | 148 | 006 |
Since yesterday's bulletin, solar activity was on the C-level, with the strongest flare being the C5.2 flare peaking yesterday at 21:24 UT in the Catania sunspot group 44 (NOAA AR 1255) close to the east-south-east limb. The same active region yesterday produced the M2.5 flare that was accompanied only by a weak and narrow CME. The solar background X-ray flux is currently around the C1 level. We expect flaring activity up the M-level, in particular from the Catania sunspot group 44. The former NOAA AR 2139 (that was responsible for the major eruption on the far side of the Sun on September 1) is now appearing from behind the east limb. The solar proton flux, although increased, has stabilized below the SEP event threshold. We maintain the warning condition for a proton event. The Earth is currently inside a slow (around 390 km/s) solar wind flow with average (around 5 nT) interplanetary magnetic field magnitude. The geomagnetic conditions are quiet and are expected to remain so.
今日估計的國際太陽黑子數(ISN):084,基於13個觀測站。
| 卡塔尼亞沃爾夫數 | /// |
| 10厘米太陽通量 | 138 |
| AK Chambon La Forêt | 014 |
| AK Wingst | 010 |
| 估計地磁Ap指數 | 011 |
| 估計國際太陽黑子數 | 070 - 基於21個觀測站 |
| 日 | 開始 | 最大值 | 結束 | 位置 | 強度 | OP | 10cm | 卡塔尼亞天體物理觀測站/美國國家海洋暨大氣管理局 | 電波爆發類型 |
|---|
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