查看星期三, 17 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 17 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

Minor storm expected (A>=30 or K=5)

太陽質子

Quiet

	10公分通量	Ap
17 Dec 2025	115	012
18 Dec 2025	116	017
19 Dec 2025	115	008

太陽活動區和耀斑

Solar flaring activity during the last 24 hours has been low, with only a few C-class flares. The strongest flare was a C1.9 flare (SIDC Flare 6439) from beyond the east limb, peaking at 13:51 UTC on December 16. There are currently five numbered active regions on the solar disk. The most complex ones have a beta magnetic type. SIDC Sunspot Group 727 (NOAA Active Region 4309) and SIDC Sunspot Group 725 have decayed into plage. The solar flaring activity is expected to be low over the next 24 hours, with C-class flares very likely.

日冕物質拋射

A Coronal Mass Ejection (SIDC CME 611) was observed in STEREO-A/COR2 coronagraph imagery, lifting off around 03:00 UTC on December 17. It is a backsided event and it is not expected to impact Earth. No other Earth-directed CMEs were observed in the available coronagraph imagery over the last 24 hours.

太陽風

The solar wind conditions (ACE) during the last 24 hours were enhanced, likely under the ongoing influence of a high-speed stream from the northern, negative polarity coronal hole (SIDC Coronal Hole 142) and possibly the early arrival of high-speed streams from the north-south elongated, negative polarity coronal hole (SIDC Coronal Hole 136) and the southern, negative polarity coronal hole (SIDC Coronal Hole 137). The solar wind speed increased from 600 km/s to around 710 km/s. The interplanetary magnetic field values ranged between 4 nT and 10 nT. The Bz component was between -6 nT and 6 nT. The interplanetary magnetic field angle phi was mostly negative. Enhanced solar wind conditions are expected over the next 24 hours, under the ongoing influence of the high-speed stream from SIDC Coronal Holes 136 and 137.

地磁

Geomagnetic conditions globally were mostly at unsettled levels (NOAA Kp 3 to 3+ ) during the last 24 hours. Geomagnetic conditions locally were quiet to unsettled (K Bel 2 to 3) during the last 24 hours. Unsettled to active conditions (NOAA Kp 3 to 4), with a small chance of isolated periods of minor storm conditions (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 during the last 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 close to the 1000 pfu threshold but remained mostly below it during the last 24 hours. It is expected to remain mostly below the 1000 pfu threshold 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）：078，基於05個觀測站。

太陽活動指數 16 Dec 2025

卡塔尼亞沃爾夫數	///
10厘米太陽通量	117
AK Chambon La Forêt	020
AK Wingst	012
估計地磁Ap指數	012
估計國際太陽黑子數	073 - 基於13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

<< 回到每日概觀