查看星期一, 29 12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 Dec 29 1240 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
29 Dec 2025	195	010
30 Dec 2025	203	017
31 Dec 2025	210	038

太陽活動區和耀斑

Solar flaring activity was moderate over the past 24 hours, with 4 M-class flares recorded. The largest flare was an M4.2 flare (SIDC Flare 6518) peaking on December 28 at 22:39 UTC, which was produced by SIDC Sunspot Group 735 (NOAA Active Region 4317). SIDC Sunspot Groups 744 and 745 (NOAA Active Regions 4324 and 4325, respectively) are two of the other complex regions on disk (Beta-Gamma) and both also produced low level M-class flares and were growing over the period. SIDC Sunspot Group 740 (NOAA Active Region 4321, magnetic type Beta Delta) was quiet and is now approaching the west solar limb. The remaining regions are simple and mostly quiet. Solar flaring activity is expected to be moderate over the next 24 hours, with M-class flares expected and a chance for X-class flares.

日冕物質拋射

A partial halo Coronal Mass Ejection (CME) directed to the north-west, with a width of approximately 120 degrees and speed of around 450 km/s, was detected in LASCO-C2 data from 23:00 UTC on December 28. This CME (SIDC CME 616) was associated with an M4.2 flare (SIDC Flare 6518) peaking on December 28 at 22:39 UTC, which was produced by SIDC Sunspot Group 735 (NOAA Active Region 4317). This CME is currently being modelled, but initial analysis suggests this would likely have a glancing blow arrival at Earth early on January 01. No other Earth-directed (CMEs) were observed in the available coronagraph imagery.

日冕洞

SIDC Coronal Hole 140 (mid-latitude, negative polarity) continues to transit the central meridian since December 28.

太陽風

Over the past 24 hours, solar wind parameters reflected a slow solar wind regime. The solar wind speed decreased from 480 km/s to around 415 km/s. The interplanetary magnetic field ranged between 3 and 8 nT, and Bz had a minimum of -5nT. The interplanetary magnetic field angle phi was mostly in the positive sector. Slow solar wind conditions are expected to continue for the next 24 hours. From late on December 30, enhanced solar wind conditions are possible due the CIR and high speed stream arrival associated with SIDC Coronal Hole 140 (negative polarity) which began to cross the central meridian on December 28.

地磁

Geomagnetic conditions were at quiet to unsettled levels globally (NOAA Kp 1 to 3) and locally (K BEL 1 to 3) over the past 24 hours. Quiet to unsettled conditions are expected for 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 this 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, as measured by GOES-18 and GOES-19 satellites, was mostly above the 1000 pfu threshold for past 24 hours. The greater than 2 MeV electron flux is expected to again exceed the 1000 pfu threshold over the next 24 hours. The electron fluence was at moderate levels and is expected to remain so.

今日估計的國際太陽黑子數（ISN）：141，基於08個觀測站。

太陽活動指數 28 Dec 2025

卡塔尼亞沃爾夫數	///
10厘米太陽通量	188
AK Chambon La Forêt	019
AK Wingst	010
估計地磁Ap指數	009
估計國際太陽黑子數	152 - 基於22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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