查看星期三, 23 4月 2025歷史檔案

SIDC 太陽影響數據分析中心的每日公告

發布時間: 2025 Apr 23 1231 UTC

SIDC太陽影響數據分析中心的預報

太陽閃焰

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
23 Apr 2025	163	007
24 Apr 2025	165	007
25 Apr 2025	167	016

太陽活動區和耀斑

A total of 11 numbered sunspot groups were identified on the disk over the past 24 hours. Only C-class flaring was observed. The largest flare was a C2.6 flare (SIDC Flare 4183) peaking on April 22 at 18:57 UTC, which was produced by SIDC Sunspot Group 473 (NOAA Active Region 4062). Solar flaring activity is expected to be low over the next 24 hours, with C-class flares expected and M-class flares possible.

日冕物質拋射

No Earth-directed CMEs were observed in the available coronagraph imagery in the last 24 hours.

日冕洞

There is a large positive polarity coronal hole (SIDC Coronal Hole 104) covering a large area of the southern hemisphere.

太陽風

The solar wind speed at the Earth is returning to low values with a vanishing influence of the high speed solar wind stream from the large positive polarity coronal hole in the southern hemisphere (SIDC Coronal Hole 104). The solar wind speed has decreased to 460 km/s, with an interplanetary magnetic field around 5 nT. We expect slow solar wind conditions for the next 24 hours. After that, we may see again an increase in solar wind speed, due to the irregular shape of the same coronal hole.

地磁

Geomagnetic conditions have been quiet to unsettled both locally and at planetary levels (K_Bel and Kp up to 3). Similar conditions can be expected in the next 24 hours.

質子通量水平

The greater than 10 MeV proton flux was below the threshold level over the past 24 hours. It is expected to remain below the threshold level over the next 24 hours.

地球靜止軌道上的電子通量

The greater than 2 MeV electron flux measured by GOES 18 and 19 was below the threshold over the past 24 hours. The greater than 2 MeV electron flux is expected to increase over the next 24 hours, due to the influence of the high speed stream. The 24-hour electron fluence is presently at normal levels, it may increase over the next 24 hours.

今日估計的國際太陽黑子數（ISN）：152，基於12個觀測站。

太陽活動指數 22 Apr 2025

卡塔尼亞沃爾夫數	///
10厘米太陽通量	163
AK Chambon La Forêt	016
AK Wingst	015
估計地磁Ap指數	015
估計國際太陽黑子數	174 - 基於32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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