查看星期日, 19 9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 Sep 19 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
19 Sep 2021	074	002
20 Sep 2021	076	001
21 Sep 2021	077	001

公告

The solar activity was at low levels with only one detection of a C-class flare during the last 24 hours. The leading part of the newly numbered NOAA Active Region (AR) 2871 is now visible from Earth. This is the region that produce the C1.6 flare of today at 01:04 UT. Further C-class activity is expected from this AR in the next 24 hours.

No Earth-directed CMEs were detected in the available coronagraph imagery over the past 24 hours.

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

The Solar Wind (SW) parameters as observed by ACE and DSCOVR returned to a typical slow SW regime during the past 24 hours. The SW speed gradually dropped from 410 to 320 km/s, the total magnetic field strength (Btot) dropped from 7.7 to 2.6 nT and the vertical magnetic field component (Bz) varied between -3.9 and 5.9 nT in the last 24 hours. The interplanetary magnetic field angle (phi) was predominantly in the negative sector (directed towards the Sun) during the past 24 hours. The SW is expected to remain in a slow SW regime for the next 24 hours.

The geomagnetic conditions over the past 24 hours were globally and locally quiet (NOAA Kp index 0-2 and K Dourbes 1-2). They are expected to remain quiet both globally and locally in the next 24 hours.

今日估計的國際太陽黑子數（ISN）：012，基於15個觀測站。

太陽活動指數 18 Sep 2021

卡塔尼亞沃爾夫數	///
10厘米太陽通量	074
AK Chambon La Forêt	008
AK Wingst	007
估計地磁Ap指數	010
估計國際太陽黑子數	000 - 基於27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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