查看星期三, 24 3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 Mar 24 1230 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
24 Mar 2021	079	007
25 Mar 2021	082	007
26 Mar 2021	082	007

公告

Solar activity was at very low levels in the past 24 hours. NOAA AR 2811 and Catania group 81 produced only minor B-class flares. A new small active region that rotated into view has been numbered by NOAA as AR 2812 (alpha magnetic field configuration). Solar activity is expected to remain at low levels, with a small chance of a C-class flare.

A Coronal Mass Ejection (CME) was observed on 22 March, 01:10 UT. It has an Earth-directed component and its speed is estimated to 250-300 km/s. It is expected to reach Earth on 26 March.

An equatorial negative polarity coronal hole crossed the central meridian, its associated high speed stream will arrive at the Earth in about 3 days.

The greater than 10 MeV proton flux was below nominal levels over the past 24 hours and is expected to remain so for the next 24 hours. The greater than 2 MeV electron flux exceeded the 1000 pfu threshold in the past 24 hours and is expected to remain elevated in the next 24 hours. The 24h electron fluence was at moderate levels in the last 24 hours and is expected to remain at moderate levels in the next 24 hours.

The solar wind speed decreased from 500 km/s to 420 km/s. The interplanetary magnetic field magnitude varied between 1 and 5 nT. Bz was between 3 and -4 nT. The magnetic field phi angle showed alternating polarity. Slow solar wind conditions are expected in the next 24 hours.

Geomagnetic conditions were quiet to unsettled, Kp varied between 2 and 3 and local K Dourbes between 1 and 3 over the past 24 hours. The CME observed on 20 March could still arrive today and cause at most active conditions (otherwise mostly quiet conditions expected).

今日估計的國際太陽黑子數（ISN）：027，基於16個觀測站。

太陽活動指數 23 Mar 2021

卡塔尼亞沃爾夫數	///
10厘米太陽通量	079
AK Chambon La Forêt	019
AK Wingst	013
估計地磁Ap指數	012
估計國際太陽黑子數	025 - 基於20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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