Viewing archive of Tuesday, 20 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 flux
54 181B1.96C5.05

Sunspot regions

Region 12816

Number of
sunspots
Size Class Magn. Class Spot Location
10 2 110 -10 CAO S24E07
HMIIF
HMIBC

Solar flares on this day

B6.1

Region 12817

Number of
sunspots
Size Class Magn. Class Spot Location
13 5 140 80 DAI N18W60
HMIIF
HMIBC

Solar flares on this day

B2.7 B2.3 B2.3 B3.7 B6.4 B7.5 B3.4 B5.0 B5.2 B3.4 B3.7 B6.2 B5.0 B3.4 B5.4 B4.9

Region 12818

Number of
sunspots
Size Class Magn. Class Spot Location
1 90 HSX S17E66
HMIIF
HMIBC

All times in UTC

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Current data suggests there is a slight possibility for aurora to appear at the following high latitude regions in the near future

Norilsk, Vorkuta
The maximum X-ray flux of the past two hours is:
M1.61

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Latest alerts

17:27 UTC - Solar flare

Moderate M1.5 flare

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17:03 UTC - Solar flare

Moderate M1.61 flare

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16:45 UTC - Radio Blackout

Minor R1 radio blackout in progress (≥M1 - current: M1.61)


02:09 UTC - Solar flare

Moderate M1.54 flare from sunspot region 4048

alert


01:42 UTC - Radio Blackout

Minor R1 radio blackout in progress (≥M1 - current: M1.24)


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Space weather facts

Last X-flare2025/03/28X1.1
Last M-flare2025/03/30M1.4
Last geomagnetic storm2025/03/27Kp5 (G1)
Spotless days
Last spotless day2022/06/08
Monthly mean Sunspot Number
February 2025154.6 +17.6
March 2025127.5 -27.1
Last 30 days127.5 -24.7

This day in history*

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*since 1994

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