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SIDC 太陽影響數據分析中心的每日公告

發布時間: 2025 Apr 12 1242 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
12 Apr 2025	172	015
13 Apr 2025	176	014
14 Apr 2025	178	011

太陽活動區和耀斑

Solar flaring activity reached high levels over the past 24 hours with registered six M-class flares. A total of 8 numbered sunspot groups were identified on the disk over the past 24 hours. The largest and most complex active region on the visible solar disc, which produced most of the observed flaring activity is SIDC Sunspot Group 469 (NOAA Active Region 4055) currently located at N08W54. The region has a magnetic type classification beta-gamma-delta and has produced all six M-class flares. The largest activity was an M2.0 flare (SIDC Flare 4097) with peak time at 11:17 UTC on April 12. SIDC Sunspot Group 470 (NOAA Active Region 4058), SIDC Sunspot Group 450 (NOAA Active Region 4060) and SIDC Sunspot Group 440 (NOAA Active Region 4061) have exhibited some growth, all currently classified as magnetic type beta. The remaining regions are simple and have been quiet. The solar flaring activity over the next 24 hours is expected to be at moderate and possibly high levels with very likely further M-class flaring and 20% chances for X-class flares.

日冕物質拋射

No Earth-directed coronal mass ejections (CMEs) are observed in the available coronagraph imagery over the past 24 hours.

日冕洞

A very small and compact equatorial positive polarity coronal hole has crossed the central meridian over the past 24 hours. Another compact mid-latitude positive polarity coronal hole is currently crossing the central meridian. Any possible weak connections to the high speed streams emanating from these coronal holes which might be observed at Earth on April 15.

太陽風

Over the past 24 hours the solar wind parameters (ACE and DSCOVR) reflected waning connection to a high speed stream. The magnitude of the interplanetary magnetic field (B) reached a maximum value of 10 nT with a minimum Bz of -9 nT. The solar wind speed varied between 375 km/s and 530 km/s. The B field phi angle was entirely in the negative sector (directed towards the Sun). The solar wind conditions are expected to remain mildly enhanced over the next 24 hours under the waning influence of a high speed stream.

地磁

The geomagnetic conditions over the past 24 hours were globally quiet to active with quiet to unsettled conditions registered locally over Belgium. Mostly quiet to active geomagnetic conditions are expected for the next three days.

質子通量水平

Over the past 24 hours the greater than 10 MeV GOES proton flux has been at nominal levels and is expected to remain so over the next days with possible enhancements in the upcoming days related to the increased levels of flaring activity from SIDC Sunspot Group 469 (NOAA Active Region 4055).

地球靜止軌道上的電子通量

The greater than 10 MeV GOES 18 electron fluxes has exceeded the 1000 pfu threshold over the last 24 hours and is expected to briefly exceed the 1000 pfu threshold in the next 24 hours. The 24-hour electron fluence was at moderate levels and is expected to remain so in the next 24 hours.

今日估計的國際太陽黑子數（ISN）：111，基於19個觀測站。

太陽活動指數 11 Apr 2025

卡塔尼亞沃爾夫數	148
10厘米太陽通量	170
AK Chambon La Forêt	///
AK Wingst	016
估計地磁Ap指數	017
估計國際太陽黑子數	126 - 基於36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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