Viewing archive of Friday, 31 December 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
53 -241 1B2.63C9.885

Sunspot regions

Region 12916

Number of
sunspots
Size Class Magn. Class Spot Location
8 -6 420 -220 EHI N20W67
HMIIF
HMIBC

Solar flares on this day

B4.5 B4.5 B7.9

Region 12917

Number of
sunspots
Size Class Magn. Class Spot Location
1 10 AXX S27W90
HMIIF
HMIBC

Region 12918

Number of
sunspots
Size Class Magn. Class Spot Location
2 -7 20 -40 BXO S16W49
HMIIF
HMIBC

Solar flares on this day

C1.9 C4.6 C9.8 C8.2 B6.3

Region 12919

Number of
sunspots
Size Class Magn. Class Spot Location
1 10 -30 HRX S11W13
HMIIF
HMIBC

Region 12921

Number of
sunspots
Size Class Magn. Class Spot Location
2 300 DSO N30W0*
HMIIF
HMIBC

Region 12922

Number of
sunspots
Size Class Magn. Class Spot Location
1 10 AXX S17E24
HMIIF
HMIBC

All times in UTC

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Space weather facts

Last X-flare2025/03/28X1.1
Last M-flare2025/04/01M2.5
Last geomagnetic storm2025/03/27Kp5 (G1)
Spotless days
Last spotless day2022/06/08
Monthly mean Sunspot Number
February 2025154.6 +17.6
April 2025152.5 -2.1
Last 30 days130.7 -17.9

This day in history*

Solar flares
12001X1.77
22017M8.35
31999M6.2
42001M3.57
52017M1.81
DstG
11979-168G4
21960-151G3
31992-105G2
42004-104G2
51994-103G3
*since 1994

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