Viewing archive of Friday, 23 April 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
29 -130B2.4C2.476

Sunspot regions

Region 12816

Number of
sunspots
Size Class Magn. Class Spot Location
8 2 50 CRO S24W31
HMIIF
HMIBC

Solar flares on this day

B8.4 B2.9 B4.9 B9.6 C1.0 C1.4 B4.1 B6.8

Region 12817

Number of
sunspots
Size Class Magn. Class Spot Location
5 140 CSO N18W0*
HMIIF
HMIBC

Solar flares on this day

C1.3 C1.4 B4.1 B6.6 C2.3 C2.3 C2.4

Region 12818

Number of
sunspots
Size Class Magn. Class Spot Location
1 50 HSX S17E25
HMIIF
HMIBC

All times in UTC

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Last X-flare2024/11/06X2.39
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Last geomagnetic storm2024/11/10Kp5+ (G1)
Spotless days
Last spotless day2022/06/08
Monthly mean Sunspot Number
October 2024166.4 +25
November 2024166 -0.4
Last 30 days163.2 +18.4

This day in history*

Solar flares
11999X1.15
21999M8.06
32005M5.58
41999M4.11
52005M3.72
DstG
11960-167G3
21998-109G2
32012-108G2
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*since 1994

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