查看星期一, 21 7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 Jul 21 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
21 Jul 2025	145	007
22 Jul 2025	143	010
23 Jul 2025	140	019

太陽活動區和耀斑

Solar flaring activity was low over the past 24 hours, with only C-class flares. The strongest flare was a C6.5 flare (SIDC Flare 4927) peaking at 15:37 UTC on July 20, which was associated with SIDC Sunspot Group 522 (NOAA Active Regions 4136). There are currently ten numbered active regions on the solar disk. SIDC Sunspot Groups 522, 558, 559, 564, 565, 566 (NOAA Active Regions 4136, 4142, 4143, 4149, 4150, 4151) are the most complex ones with magnetic type beta. SIDC Sunspot Group 566 (NOAA Active Region 4151) has emerged in the northwest quadrant. SIDC Sunspot Group 567 (magnetic type alpha) has rotated on disc from the east limb, in the northeast quadrant. SIDC Sunspot Group 562 (NOAA Active Regions 4139) has rotated over the west limb. The solar flaring activity is expected to be moderate over the next 24 hours, with M-class flares very likely and a small chance for X-class flares.

日冕物質拋射

A prominence eruption was observed in AIA 304 data around 16:30 UTC on July 20, in the east limb. A very narrow associated Coronal Mass Ejection (SIDC CME 527) was observed in LASCO/C2 coronagraph imagery around 17:00 UTC on July 20. It is not expected to impact Earth. No other Earth-directed CMEs were observed in the available coronagraph imagery.

日冕洞

An elongated, mid-latitude, negative polarity coronal hole (SIDC Coronal Hole 116) continues to cross the central meridian since July 19. An associated high-speed stream may arrive at Earth starting from July 23.

太陽風

Over the past 24 hours, the solar wind parameters (ACE and DSCOVR) reflected mostly slow solar wind conditions. Speed values ranged between 330 km/s and 440 km/s. The interplanetary magnetic field values were between 3 nT and 7 nT. The Bz component varied between -5 nT and 5 nT. The interplanetary magnetic field angle was mostly in the positive sector. Slow solar wind conditions are expected over the next 24 hours.

地磁

Geomagnetic conditions globally were mostly at quiet levels (NOAA Kp 1 to 2). Geomagnetic conditions locally were mostly at quiet to unsettled levels (K BEL 1 to 3). 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 level over the past 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 above the 1000 pfu threshold in the last 24 hours. The greater than 2 MeV electron flux is expected to remain above the 1000 pfu threshold the next 24 hours. The 24-hour electron fluence is presently at high 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）：151，基於15個觀測站。

太陽活動指數 20 Jul 2025

卡塔尼亞沃爾夫數	///
10厘米太陽通量	150
AK Chambon La Forêt	011
AK Wingst	008
估計地磁Ap指數	006
估計國際太陽黑子數	159 - 基於20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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