查看星期四, 18 9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 Sep 18 1231 UTC

SIDC太陽影響數據分析中心的預報

太陽閃焰

M-class flares expected (probability >=50%)

地磁

Quiet (A<20 and K<4)

太陽質子

Quiet

	10公分通量	Ap
18 Sep 2025	150	007
19 Sep 2025	152	005
20 Sep 2025	154	006

太陽活動區和耀斑

Solar flaring activity was at low levels over the past 24 hours with only C-class flares identified. A total of 7 numbered sunspot groups were identified on the visible solar disk. Most regions have been classified as simple bipolar groups with magnetic type beta and SIDC Sunspot Group 607 (NOAA Active Region 4225) is a simple unipolar group, classified as magnetic type alpha. The strongest activity was a C2.8 flare (SIDC Flare 5513) with peak time at 00:04 UTC on Sept 18 produced by SIDC Sunspot Group 643 (NOAA Active Region 4223). Most of the detected flaring activity was produced by SIDC Sunspot Group 621 (NOAA Active Regions 4216) and SIDC Sunspot Group 637 (NOAA Active Region 4220) with the latter group exhibiting significant growth. The solar flaring activity over the next 24 hours is expected to be at low to moderate levels with very likely C-class flares and 51% chances for M-class flaring.

日冕物質拋射

No Earth-directed coronal mass ejections (CMEs) have been identified in the available coronagraph imagery over the past 24 hours.

太陽風

Over the past 24 hours the solar wind parameters (as measured by ACE) have registered an expected return towards slow solar wind conditions. The solar wind speed has declined from about 700 km/s to about 500 km/s at present. The magnitude of the interplanetary magnetic field, B, remained weak with a maximum of 4.7 nT and a minimum Bz component of - 4.4 nT. The B field phi angle remained predominantly in the negative sector (directed towards the Sun). The solar wind conditions are expected to be at background slow solar wind levels over the next days.

地磁

The geomagnetic conditions over the past 24 hours (both globally and locally over Belgium) were at quiet to unsettled levels. The geomagnetic conditions over the next days are expected to be predominantly quiet with possible isolated unsettled intervals.

質子通量水平

Over the past 24 hours the greater than 10 MeV GOES proton flux has been at nominal levels and is expected to remain at nominal levels over the next days.

地球靜止軌道上的電子通量

The greater than 10 MeV GOES electron flux has exceeded the 1000 pfu threshold over the last 24 hours and is expected to exceed the threshold again over the next 24 hours. The 24-hour electron fluence was at moderate levels and is expected to remain at moderate levels over the next days.

今日估計的國際太陽黑子數（ISN）：134，基於11個觀測站。

太陽活動指數 17 Sep 2025

卡塔尼亞沃爾夫數	///
10厘米太陽通量	147
AK Chambon La Forêt	015
AK Wingst	011
估計地磁Ap指數	010
估計國際太陽黑子數	130 - 基於21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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