查看星期四, 28 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 28 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

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

太陽質子

Quiet

	10公分通量	Ap
28 May 2026	142	014
29 May 2026	143	014
30 May 2026	144	013

太陽活動區和耀斑

Solar flaring activity has been low over the last 24 hours, with a few C-class flares. The strongest flare was a C3.4 flare (SIDC Flare 7790) peaking at 12:16 UTC on May 27, associated with SIDC Sunspot Group 876 (NOAA Active Region 4451, magnetic type beta). There are currently twelve numbered active regions on the solar disk. The most complex ones have a beta magnetic configuration. SIDC Sunspot Group 883 (NOAA Active Region 4453, magnetic type beta) and SIDC Sunspot Group 872 (NOAA Active Region 4443, magnetic type alpha) are currently rotating across the west limb. SIDC Sunspot Group 880 (NOAA Active Region 4450) and SIDC Sunspot Group 881 have decayed into plage. 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

No Earth-directed Coronal Mass Ejections (CMEs) were observed in the available coronagraph imagery during the last 24 hours.

日冕洞

A small, equatorial, negative polarity coronal hole (SIDC Coronal Hole 165) is crossing the central meridian. A mild associated high- speed stream may arrive at Earth starting from the UTC evening on May 31.

太陽風

Over the last 24 hours, the solar wind parameters (ACE and DSCOVR) reflected slow solar wind conditions. The solar wind speed varied between 380 km/s and 430 km/s. The interplanetary magnetic field was between 6 nT and 10 nT. The Bz component varied between -8 nT and 7 nT. The interplanetary magnetic field angle phi was predominantly in the negative sector. Mostly slow solar wind conditions are expected over the next 24 hours, with a chance for enhanced conditions in case of the late arrival of a mild, high-speed stream from the southern, negative polarity coronal hole (SIDC Coronal Hole 149).

地磁

Geomagnetic conditions globally were quiet to unsettled (NOAA Kp 2 to 3) during the last 24 hours. Geomagnetic conditions locally were quiet to unsettled (K Bel 1 to 3) during the last 24 hours. Mostly unsettled to active conditions (NOAA Kp 3 to 4), with a small chance for isolated minor storm intervals (NOAA Kp 5) are expected over the next 24 hours, in case of the late 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 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 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）：158，基於24個觀測站。

太陽活動指數 27 May 2026

卡塔尼亞沃爾夫數	211
10厘米太陽通量	142
AK Chambon La Forêt	018
AK Wingst	014
估計地磁Ap指數	015
估計國際太陽黑子數	177 - 基於30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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