Viewing archive of Tuesday, 7 September 2021 - Sunspot regions

Sunspot regions

Courtesy of SDO, SOHO (NASA) and the [MDI, AIA, EVE, and/or HMI] consortium.
Sunspot number New regionsBackground fluxMaximum fluxC
85 50B2.3C1.591

Sunspot regions

Region 12863

Number of
sunspots
Size Class Magn. Class Spot Location
2 -2 80 -20 HSX S16W41
HMIIF
HMIBC

Solar flares on this day

B6.2

Region 12864

Number of
sunspots
Size Class Magn. Class Spot Location
10 220 40 CSO N24W33
HMIIF
HMIBC

Region 12866

Number of
sunspots
Size Class Magn. Class Spot Location
23 8 430 210 DKC S17E21
HMIIF
HMIBC

Solar flares on this day

B7.5 B5.7 B6.9 C1.1 B4.9

Region 12868

Number of
sunspots
Size Class Magn. Class Spot Location
10 -1 240 20 DSO S21E05
HMIIF
HMIBC

All times in UTC

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G1 - Minor geomagnetic storm

Observed Kp: 5
Threshold reached: 21:40 UTC
The density of the solar wind is moderate (21.47 p/cm3)
The strength of the interplanetary magnetic field is moderate (13.51nT), the direction is North (5.4nT).
The Disturbance Storm Time index predicts strong storm conditions right now (-110nT)

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Latest alerts

21:45 UTC - Geomagnetic activity

Minor G1 geomagnetic storm (Kp5) Threshold Reached: 21:36 UTC

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21:00 UTC - Geomagnetic activity

Severe G4 geomagnetic storm (Kp8) Threshold Reached: 20:55 UTC

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19:45 UTC - Geomagnetic activity

Strong G3 geomagnetic storm (Kp7) Threshold Reached: 19:25 UTC

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19:00 UTC - Geomagnetic activity

Moderate G2 geomagnetic storm (Kp6) Threshold Reached: 18:38 UTC

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18:45 UTC - Geomagnetic activity

Minor G1 geomagnetic storm (Kp5) Threshold Reached: 18:28 UTC

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Space weather facts

Last X-flare2025/03/28X1.1
Last M-flare2025/04/15M1.2
Last geomagnetic storm2025/04/15Kp6+ (G2)
Spotless days
Last spotless day2022/06/08
Monthly mean Sunspot Number
March 2025134.2 -20.4
April 2025124.1 -10.1
Last 30 days122.5 -17.8

This day in history*

Solar flares
12002M3.66
22012M2.54
32001M1.68
42014M1.47
52002M1.33
DstG
12015-88G2
21973-79G2
32000-78
41971-73
52024-65G1
*since 1994

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