查看星期四, 21 1月 2021歷史檔案

SIDC 太陽影響數據分析中心的每日公告

發布時間: 2021 Jan 21 1255 UTC

SIDC太陽影響數據分析中心的預報

太陽閃焰

Quiet conditions (<50% probability of C-class flares)

地磁

Quiet (A<20 and K<4)

太陽質子

Quiet

	10公分通量	Ap
21 Jan 2021	079	004
22 Jan 2021	078	009
23 Jan 2021	078	006

公告

There are presently two numbered sunspot groups observed on the visible side of the Sun, Catania sunspot groups 66 and 67 (NOAA ARs 2797 and 2798). During last 24 hours 10 B-class flares and 1 C-class flare were reported, all originating from the NOAA AR 2798. The C 1.4 flare which peaked at 12:53 UT on January 20 was associated with a slow CME. We expect B-class flares and occasional C-class flares in the coming hours. The filament eruption in the south-west quadrant of the Sun was associated with a rather narrow CME which is unlikely to arrive to Earth. During last 24 hours the proton flux levels remained at background values.

During last 48 hours the solar wind speed fluctuates around 340 km/s. The interplanetary magnetic field magnitude is about 6 nT. Small but well defined, equatorial coronal hole of negative polarity (situated at the same latitudes but preceding the NOAA ARs 2797 and 2798) has reached the central meridian this morning. The associated fast solar wind can be expected at Earth late on January 24. The geomagnetic conditions are presently quiet and we expect quiet to possibly unsettled geomagnetic conditions in the coming hours.

今日估計的國際太陽黑子數（ISN）：025，基於15個觀測站。

太陽活動指數 20 Jan 2021

卡塔尼亞沃爾夫數	027
10厘米太陽通量	///
AK Chambon La Forêt	009
AK Wingst	///
估計地磁Ap指數	007
估計國際太陽黑子數	018 - 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

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