查看星期三, 27 5月 2026歷史檔案

SIDC 太陽影響數據分析中心的每日公告

發布時間: 2026 May 27 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
27 May 2026	146	008
28 May 2026	149	020
29 May 2026	151	011

太陽活動區和耀斑

Solar flaring activity has been low over the past 24 hours, with few C-class flares. The strongest flare was C9.7 flare (SIDC Flare 7783) peaking at 12:38 UTC on May 26, associated with SIDC Sunspot Group 876 (previously NOAA Active Region 4451, magnetic type beta). There are currently fourteen numbered active regions on the solar disk. The most complex ones have a beta magnetic configuration. SIDC Sunspot Group 882 has decayed into plage. Returning SIDC Sunspot Groups 856 and 860 (both with magnetic type alpha) have rotated on disk from the east limb. SIDC Sunspot Group 883 (magnetic type beta) has emerged in the northwest quadrant. The solar flaring activity is expected to be low over the next 24 hours, with C-class flares very likely and a chance for M-class flares.

日冕物質拋射

A slow partial halo Coronal Mass Ejection (SIDC CME 660) was partially observed in LASCO/C2, LASCO/C3 and STEREO-A coronagraph imagery, starting from 13:30 UTC on May 26. The bulk of the ejecta is propagating to the south with an estimated projected speed of around 280-300 km/s. It is most likely a backsided event and it is not expected to impact Earth. No other Earth-directed CMEs were observed in the available coronagraph imagery during the last 24 hours.

日冕洞

A northern, mid-latitude, negative polarity coronal hole (SIDC Coronal Hole 142) is crossing the central meridian. A mild associated high-speed stream may arrive at Earth starting from the UTC evening on May 29.

太陽風

Over the last 24 hours, the solar wind parameters (ACE and DSCOVR) reflected mostly slow solar wind conditions. The solar wind speed varied between 390 km/s to 450 km/s. The interplanetary magnetic varied between 5 nT and 9 nT and the Bz component between -7 nT and 7 nT. The interplanetary magnetic field angle phi was predominantly in the negative sector. Slow solar wind conditions are expected initially over the next 24 hours, with a chance for enhanced conditions later due to the possible arrival of a mild high-speed stream from the southern, negative polarity coronal hole (SIDC Coronal Hole 149).

地磁

Geomagnetic conditions globally were mostly quiet (NOAA Kp 1-2) during the last 24 hours, with an interval of active conditions (NOAA Kp 4) between 21:00 UTC on May 26 and 00:00 UTC on May 27. 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 chance for isolated minor storm intervals (NOAA Kp 5) are expected over the next 24 hours, due to the possible arrival of a mild high-speed stream from the southern, negative polarity coronal hole (SIDC Coronal Hole 149).

質子通量水平

The greater than 10 MeV proton flux has decreased 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 below the 1000 pfu threshold during the last 24 hours. The 24-hour electron fluence was at normal levels and it is expected to remain so over the next 24 hours.

今日估計的國際太陽黑子數（ISN）：179，基於25個觀測站。

太陽活動指數 26 May 2026

卡塔尼亞沃爾夫數	222
10厘米太陽通量	141
AK Chambon La Forêt	013
AK Wingst	010
估計地磁Ap指數	008
估計國際太陽黑子數	157 - 基於26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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