查看星期一, 29 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 29 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

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

太陽質子

Quiet

	10公分通量	Ap
29 Sep 2025	175	017
30 Sep 2025	177	010
01 Oct 2025	179	010

太陽活動區和耀斑

Solar flaring activity over the last 24 hours has been moderate, with two M-class flares and multiple C-class flares. The strongest flare was an M3.6 flare (SIDC Flare 5618) peaking at 01:45 UTC on September 29, associated with SIDC Sunspot Group 653 (NOAA Active Region 4232, magnetic type beta-gamma-delta). There are currently eleven numbered active regions on the solar disk. The most complex regions are SIDC Sunspot Groups 648, 653 and 657 (NOAA Active Regions 4230, 4232 and 4236), all with magnetic type beta-gamma-delta. SIDC Sunspot Group 658 (magnetic type beta) has emerged in the northeast quadrant. SIDC Sunspot Group 659 (magnetic type beta) has emerged in the southwest quadrant. The solar flaring activity is expected to be moderate to high over the next 24 hours, with M-class flares very likely and a small chance for X-class flares.

日冕物質拋射

A Coronal Mass Ejection (SIDC CME 563) was observed in LASCO/C2 coronagraph imagery, starting from around 09:00 UTC on September 28. It is most likely associated with the M6.4 flare (SIDC Flare 5601) that peaked at 08:43 UTC on September 28. It is not expected to impact Earth. A large filament eruption was observed in AIA 304 data around 09:40 UTC on September 29, in the northwest quadrant. No associated CME was observed in the available coronagraph imagery, but further monitoring of the event is ongoing. No other Earth-directed Coronal Mass Ejections (CMEs) were observed in the available coronagraph imagery over the last 24 hours.

日冕洞

An equatorial, positive polarity coronal hole (returning SIDC Coronal Hole 128) is crossing the central meridian. An associated high-speed stream is expected to arrive at Earth starting from the UCT morning of October 02.

太陽風

The solar wind conditions (ACE) were slightly enhanced during the last 24 hours, likely due to an ICME arrival related to the slow, wide Coronal Mass Ejection that lifted off around 02:00 UTC on September 24 (SIDC CME 564). The solar wind speed ranged between 380 and 430 km/s. The interplanetary magnetic field increased from 11 to 15 nT. The Bz component reached a minimum of -13 nT. The interplanetary magnetic field angle phi was in the negative sector. A gradual decrease to slow solar wind conditions is expected over the next 24 hours.

地磁

Geomagnetic conditions globally were initially at unsettled levels (NOAA Kp 3- to 3), reaching minor storm levels (NOAA Kp 5-) since 12:00 UTC on September 29. The minor geomagnetic storm is likely due to an ICME arrival, related to the slow, wide Coronal Mass Ejection that lifted off around 02:00 UTC on September 24 (SIDC CME 564). Geomagnetic conditions locally were initially quiet to unsettled (K Bel 2-3), reaching active levels (K Bel 4) between 09:00 UTC and 11:00 UTC on September 29. Unsettled to active conditions (NOAA Kp 3-4), with possible isolated minor storm intervals (NOAA Kp 5) are expected over the next 24 hours.

質子通量水平

The greater than 10 MeV proton flux was below the 10 pfu threshold 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 GOES 19 was below the 1000 pfu threshold during the last 24 hours. It is expected to gradually increase over the next 24 hours. The 24-hour electron fluence is presently at normal levels and is expected to remain so over the next 24 hours.

今日估計的國際太陽黑子數（ISN）：189，基於19個觀測站。

太陽活動指數 28 Sep 2025

卡塔尼亞沃爾夫數	///
10厘米太陽通量	171
AK Chambon La Forêt	015
AK Wingst	010
估計地磁Ap指數	010
估計國際太陽黑子數	165 - 基於24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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