查看星期五, 25 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 25 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

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

太陽質子

Quiet

	10公分通量	Ap
25 Apr 2025	170	013
26 Apr 2025	172	016
27 Apr 2025	174	007

太陽活動區和耀斑

A total of 15 numbered sunspot groups were identified on the disk over the past 24 hours. Only C-class flaring was observed in the last 24 hours. The largest one was a C3.0 flare (SIDC Flare 4197) peaking on April 25 at 04:05 UTC, which was produced by SIDC Sunspot Group 458 (NOAA Active Region 4045). Solar flaring activity is expected to be low over the next 24 hours, with C-class flares very likely and a chance for M-class flares.

日冕物質拋射

A filament erupted over the NW limb, leading to a CME first seen at 06:36 UTC on 24 April by LASCO C2, with an angular width around 70 degrees. This CME is not expected to arrive to the Earth. 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. There are two more, smaller, coronal holes in the northern hemisphere that crossed central meridian on 24 April.

太陽風

The solar wind speed has been around 500 km/s in the last 24 hours, with an interplanetary magnetic field around 6 nT, and Bz mostly positive. In the next 24 hours we may again see an increase in solar wind speed, due to the irregular shape of the SIDC Coronal Hole 104.

地磁

Geomagnetic conditions have been quiet globally (Kp up to 2) and up to to unsettled levels locally (K_Bel up to 3). Unsettled to active 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 may increase over the next 24 hours.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）：198，基於10個觀測站。

太陽活動指數 24 Apr 2025

卡塔尼亞沃爾夫數	196
10厘米太陽通量	170
AK Chambon La Forêt	018
AK Wingst	014
估計地磁Ap指數	014
估計國際太陽黑子數	200 - 基於15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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